Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 88773fc7c3d26c03…

MALICIOUS

PDF / .VIR

205.9 KB Created: 2023-10-22 00:43:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-06-14
MD5: 641c1d9a37611c6d7d8d884d1af9a06f SHA-1: 57a2f0bd0153775c8e8d28ca950db26307b1855a SHA-256: 88773fc7c3d26c036076eac7177ed9077c8955ea989d25a9ba713f5fa8294614
194 Risk Score

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4948

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://gagejit.ragaz.co.za/82536101084809027871982952?zozonunosokulebojapejokepebadusali=lotesuxemafuzamimupopideturupaladesagulowemazijufuzijevulubexozezadexenariritawasumenikawowowozakufubolapiledudozinoberinalogumawusizuxudegipotatajewifoduwejabavolusazixojukokunubexobegezupugeromewesizujafab&utm_term=beatstep+pro+ableton+manual&rezepafijozakonakivepijovusitomapixesenanezagitibivorifafop=nejepavisodinesiwezuluzelutulukajelenurolozobawujonomudomejafubivobufewisepaxelifusetekedebaxewutosafidudekezisogovedatufomofusogurijefabexin In PDF document text
    • https://gagejit.ragaz.co.za/82536101084809027871982952?zozonunosokulebojapejokepebadusali=lotesuxemafuzamimupopideturupaladesagulowemazijufuzijevulubexozezadexenariritawasumenikawowowozakufubolapiledudozinoberinalogumawusizuxudegipotatajewifoduwejabavolusazixojukokunubexobegezupugeromewesizujafab&utPDF link annotation
    • https://gagejit.ragaz.co.za/82536101084809027871982952?zozonunosokulebojapejokepebadusali=lotesuxemafuzamimupopideturupaladesagulowemazijufuzijevulubexozezadexenariritawasumenikawowowozakufubolapiledudozinoberinalogumawusizuxudegipotatajewifoduwejabavolusazixojukokunubexobegezupugeromewesizujafab&utm_term=beatstep+pro+ableton+manual&rezepafijozakonakivepijovusitomapixesenanezagitibivorifafop=nejepavisodinesiwezuluzelutulukajelenurolozobawujonomudomejafubivobufewisepaxelifusetekedebaxewutosafidudPDF link annotation
    • https://uploads-ssl.webflow.com/64eddd1c79c3079db72ce28e/652b6369422fddacbf5217cb_5092458466.pdfIn PDF document text
    • https://uploads-ssl.webflow.com/64ede1efcd7d75aebba78d6b/652b6699fd19962a338dc6c4_87203392109.pdfIn PDF document text
    • https://5.imimg.com/data5/SELLER/Doc/2023/10/352876306/GQ/ZO/TO/200261433/7f93cc9d-9b5f-4543-b111-97b6a772102e.pdfIn PDF document text
    • https://irp.cdn-website.com/d2e39102/files/uploaded/kavopufalonafodiluw.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/9e5b6b40-f934-4273-a65f-cbaee9aa4b00/downloads/fed_up_discussion_questions_and_answers.pdfIn PDF document text
    • https://5.imimg.com/data5/SELLER/Doc/2023/10/352877033/II/DY/US/200262860/77857143910.pdfIn PDF document text
    • https://uploads-ssl.webflow.com/64f1ad2473fc956b92e689e1/652b65b6f9121f403bb1af5c_72998460854.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_off0002e87b.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0002e87b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E87B 10772 bytes
SHA-256: da06bdead1d74d3fcea10d6c37be65273abb6ec112fc79611aed4890a5ada94a
font_01_sfnt_off00030103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30103 16160 bytes
SHA-256: b28203ea5879abade86ee1d644575bdce7dbe101348bf543e69b7ad9ae08f721