Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 a81b57df28b660b9…

MALICIOUS

PDF / .VIR

422.7 KB Created: 2023-11-23 08:08:42 Authoring application: Solid Converter PDF First seen: 2024-04-28
MD5: 171df286f162d59ab223e0edc9f7f7aa SHA-1: ad1582be4008f338d45d9d4dc0db8964e8c2f949 SHA-256: a81b57df28b660b90e5db57020469d6c2c7e5e5e975e0994eb3428970ecf7735
216 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7154

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://escala-sax-alto-pdf.freedominica.com/78.pdf In PDF document text
    • http://sepuwota.motorcycleangels.org/jiranuxoto.pdfIn PDF document text
    • https://joel-osteen-libros-pdf.tebazuk.cfd/847.pdfIn PDF document text
    • http://adservice.google.co.ck/ddm/clk/300948314;127869103;e;;%3F//flights-from-tulsa-to-las-vegas.hydrogreen.xyz/363933.pdfIn PDF document text
    • http://adservice.google.co.uz/ddm/clk/408405163;208572896;n;;%3F//campbell-biology-9th-edition-chapter-5-p.otslanding.com/faw.pdfIn PDF document text
    • https://adservice.google.co.ve/ddm/clk/295204063;122181591;w;;%3F//final-fantasy-type-0-guide-pdf.xogitaf.cfd/336.pdfIn PDF document text
    • https://james-stewart-calculus-concepts-and-cont.jotitixiwu.online/rafofawamug.pdfIn PDF document text
    • https://adservice.google.com.bn/ddm/clk/300948314;127869103;e;;%3F//ralapezaseg.nigugorom.cfd/828.pdfIn PDF document text
    • https://how-long-is-the-flight-from-boston-to-ar.wowakana.cfd/79.pdfIn PDF document text
    • http://gugido.appshops.net/mogariniwimalamido.pdfIn PDF document text
    • https://quittance-de-loyer-vierge-pdf.peykweb.com/regutenizixemoritika.pdfIn PDF document text
    • http://ww-zero-point-foods-pdf.fishingtreasures.xyz/gusowoseboka.pdfIn PDF document text
    • http://schema-analisi-del-periodo-pdf.cannabisheroes.com/55.pdfIn PDF document text
    • http://adservice.google.co.zw/ddm/clk/445204615;249060672;c;;%3F//tiwigiguti.i3op.org/941.pdfIn PDF document text
    • https://suxejelixi.papijamuve.cfd/sawodutusizinil.pdfIn PDF document text
    • https://bovans-brown-management-guide-pdf.wuveguxoti.cfd/3.pdfIn PDF document text
    • http://exerc-cios-de-terapia-cognitivo-comporta.fishingxcursions.com/1909453.pdfIn PDF document text
    • https://pisunuzoxexolu.octort.co.za/303676035018038889?kobofefobaxabifetujudosenepewofesinuwijipizezanomapuwowuxakalejadawuzodideselixoxemuvagatimapujitux=xiparijijiwozezawuparoguparudopesipabimezonuwulibipogidizitoxuguruzugedewedoxaxeluvupaxulikulimusazisitisefuvaganebuvatapolalurelugadajadaxivididazoboxibitokamixuretokapusunifawopinimubogazadepimuromenazitekofa&keyword=terrorblade+guide+dota+1&wafurilowubobifogijisutijiseterazekovizigojefokomipuvasokezodawuneda=kexomiwemakozazivajogijawisorusawiwazikaravifadinakakimogagedevuxuregeladobujaxazekizezopelobepuzurafulatesuxowaraxiIn PDF document text
    • https://pisunuzoxexolu.octort.co.za/303676035018038889?kobofefobaxabifetujudosenepewofesinuwijipizezanomapuwowuxakalejadawuzodideselixoxemuvagatimapujitux=xiparijijiwozezawuparoguparudopesipabimezonuwulibipogidizitoxuguruzugedewedoxaxeluvupaxulikulimusazisitisefuvaganebuvatapolalurelugadajadaxivididPDF link annotation
    • https://pisunuzoxexolu.octort.co.za/303676035018038889?kobofefobaxabifetujudosenepewofesinuwijipizezanomapuwowuxakalejadawuzodideselixoxemuvagatimapujitux=xiparijijiwozezawuparoguparudopesipabimezonuwulibipogidizitoxuguruzugedewedoxaxeluvupaxulikulimusazisitisefuvaganebuvatapolalurelugadajadaxivididazoboxibitokamixuretokapusunifawopinimubogazadepimuromenazitekofa&keyword=terrorblade+guide+dota+1&wafurilowubobifogijisutijiseterazekovizigojefokomipuvasokezodawuneda=kexomiwemakozazivajogijawisorusaPDF link annotation
    • http://wenq.org/In extracted file (font_01_sfnt_off000663c6.bin)
    • https://adservice.google.md/ddm/clk/295204063;122181591;w;;%3F//instant-pot-crack-chicken-pasta.didimpools.com/58.pdfIn PDF document text
    • https://adservice.google.at/ddm/clk/445204615;249060672;c;;%3F//2014-cbr1000rr-service-manual-pdf.str-tischtennis.de/67.pdfIn PDF document text
    • http://adservice.google.li/ddm/clk/448794861;252804937;a;;%3F//sx95-owners-manual-pdf.pihr.info/xit.pdfIn PDF document text
    • http://adservice.google.com.sg/ddm/clk/448794861;252804937;a;;%3F//pegogam.all4petshoppe.com/629.pdfIn PDF document text
    • https://adservice.google.ga/ddm/clk/478229754;284365575;c;;%3F//cosas-que-nunca-dejamos-atras-lucy-score.zhongshanbaiyue.com/836.pdfIn PDF document text
    • http://adservice.google.com.ua/ddm/clk/445204615;249060672;c;;%3F//i-want-to-join-illuminati.exobell.info/728.pdfIn PDF document text
    • https://adservice.google.com.tw/ddm/clk/478229754;284365575;c;;%3F//economics-hubbard-o-brien-5th-edition-pd.lobofijiv.sbs/todexutifugegowadi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0006323f.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0006323f.bin)
    • http://nmr.mgh.harvard.edu/~fangq/In extracted file (font_01_sfnt_off000663c6.bin)
    • http://www.gnu.org/copyleft/gpl.htmlIn extracted file (font_01_sfnt_off000663c6.bin)
🗂 Part of campaign: wenq.org 13 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006323f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6323F 18968 bytes
SHA-256: 0be1eeb99774e8d67fa614f254d945a73f2d81875ea727ce13dc774c5f7b4246
font_01_sfnt_off000663c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x663C6 3868 bytes
SHA-256: b91dd3740e4c771202b6ed074013664d2c202211b6baaee3541cb32a2bb541a5
font_02_sfnt_off000670bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670BF 11588 bytes
SHA-256: bdf8a709bac43cf9315da1c34171d24aa7ca9da04f02376696c044548b69cced