Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 bf1a23aa8e54a4c8…

MALICIOUS

PDF / .VIR

376.1 KB Created: 2023-11-06 14:33:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-10-09
MD5: 12363740b3a99ef602b33820b1a0c3b8 SHA-1: 2185b67a1723c02e8d4558ee7bcc06c19e30366e SHA-256: bf1a23aa8e54a4c87de22c1c172ed7a30a933aaf56a0ff9c1ae0b8b0e1fb53d4
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9751

Heuristics 8

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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://rikew.convert4k.com/naketelaravete.pdf In PDF document text
    • https://zeluzafe.globalpharmatimes.com/xikowevuzefazudoto.pdfIn PDF document text
    • https://kizijonapo.soforso.com/getunuruwabipaz.pdfIn PDF document text
    • https://vepopugeg.convert4k.com/22595895056.pdfIn PDF document text
    • https://fejagas.freedomweekend.info/baxukakavuzoweferuwin.pdfIn PDF document text
    • https://voxumomuz.evileyecharm.com/bipajupozadeni.pdfIn PDF document text
    • https://xatetijew.mebel-rastem.com/xaxetu.pdfIn PDF document text
    • https://xojobegi.brookelyn.org/meriguzonejika.pdfIn PDF document text
    • https://dogupijis.davidsaffir.com/64220488867.pdfIn PDF document text
    • https://nibezubiz.haviol.co.za/91738224069263423187105614?ripemidazuribenilabejemularubikobesufobosijimosofevexetijunigofarimisejagadoxunevefokijevoxisepek=wigivilupekidosovesufagarasorifutawodijuworesizufesivikukovibifatevuwakipinabixumibedizikivepodemiluxaseduzolilamaderuzepatokokijovusipixizisazutuzabuxekitokakaxanuvetodajadatozekepetusibibubiguboguputomu&keyword=van+richten%27s+guide+to+ravenloft+pdf+free&jetutuzegofopusaresupirezixumakafemimubafulububevizamulirexiwezulofozotamefure=jowafifuxegujiwufapufetiperedilokukaviwerefujojubegeguzofolifepolomobetepirikuravixakewiderusasuzejelutobaketetejuniwedeIn PDF document text
    • https://busavuko.classiccountry1390.com/rirewowifoxudixo.pdfIn PDF document text
    • https://nibezubiz.haviol.co.za/91738224069263423187105614?ripemidazuribenilabejemularubikobesufobosijimosofevexetijunigofarimisejagadoxunevefokijevoxisepek=wigivilupekidosovesufagarasorifutawodijuworesizufesivikukovibifatevuwakipinabixumibedizikivepodemiluxaseduzolilamaderuzepatokokijovusipixizisazuPDF link annotation
    • https://nibezubiz.haviol.co.za/91738224069263423187105614?ripemidazuribenilabejemularubikobesufobosijimosofevexetijunigofarimisejagadoxunevefokijevoxisepek=wigivilupekidosovesufagarasorifutawodijuworesizufesivikukovibifatevuwakipinabixumibedizikivepodemiluxaseduzolilamaderuzepatokokijovusipixizisazutuzabuxekitokakaxanuvetodajadatozekepetusibibubiguboguputomu&keyword=van+richten%27s+guide+to+ravenloft+pdf+free&jetutuzegofopusaresupirezixumakafemimubafulububevizamulirexiwezulofozotamefure=jowafifuPDF link annotation
    • https://uploads-ssl.webflow.com/64edd7455d73b31fc79a3123/6548d642deacb74d23f0ae47_vikore.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_off00058a83.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00058a83.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058a83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58A83 17544 bytes
SHA-256: 16acaf372e93f2e86ac2f8c30371d553b1ab07c7fa177d36bc267ab7f44bda04
font_01_sfnt_off0005b758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B758 11476 bytes
SHA-256: 3c0809c3b612b181e5a39d6f1a0142dd5714b346b069bea418a8850d31c14ec2