Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 6ea1d1b45dc09384…

MALICIOUS

PDF / .VIR

480.7 KB Created: 2023-10-20 19:52:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-07-02
MD5: 45ca20278cb06b24cb9c3ba8f6960dfc SHA-1: b50da9c2a9d904b00a98e07dbf64b66044109786 SHA-256: 6ea1d1b45dc09384f717576a20b5a6c58b3cf662beec7a329ed9d56823cc28c1
186 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0690

Heuristics 7

  • 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.
  • 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://godefiberefofu.mifuj.co.za/24365946794419231271229420?rekakujosituvovifapawiwojodedokowog=lufawufiwifagufuvetazibifanajaperojusikuzotujufuxalebelamepavozodezatitusufisizepabomitemolojemibawujuruzojorevumuruvadawewokogikafevigalowuwaxizapurifirofedasiwosimamovujebemenolalanezuvawajapavajulojugup&utm_term=books+on+movement+for+grade+schoolers&bolezatuseguwuwabemafifojaxudipekomapojetoviwanujiwisojonuragotezuleraboxarojeximutedisezoluli=nizulenatiridokukipevegezosawawikozedekozoximidewozefirujaparipijeginiradewagarokixogesujamagegunufuzapi In PDF document text
    • https://godefiberefofu.mifuj.co.za/24365946794419231271229420?rekakujosituvovifapawiwojodedokowog=lufawufiwifagufuvetazibifanajaperojusikuzotujufuxalebelamepavozodezatitusufisizepabomitemolojemibawujuruzojorevumuruvadawewokogikafevigalowuwaxizapurifirofedasiwosimamovujebemenolalanezuvawajapavajulojuPDF link annotation
    • https://godefiberefofu.mifuj.co.za/24365946794419231271229420?rekakujosituvovifapawiwojodedokowog=lufawufiwifagufuvetazibifanajaperojusikuzotujufuxalebelamepavozodezatitusufisizepabomitemolojemibawujuruzojorevumuruvadawewokogikafevigalowuwaxizapurifirofedasiwosimamovujebemenolalanezuvawajapavajulojugup&utm_term=books+on+movement+for+grade+schoolers&bolezatuseguwuwabemafifojaxudipekomapojetoviwanujiwisojonuragotezuleraboxarojeximutedisezoluli=nizulenatiridokukipevegezosawawikozedekozoximidewozefiPDF link annotation
    • https://img1.wsimg.com/blobby/go/aa930190-2e12-4ce7-8bd7-0454f2ef6721/downloads/31952335554.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/10e01255-b324-4a54-ae63-f4e28a319147/downloads/mugijabutetisukokitemu.pdfIn PDF document text
    • https://5.imimg.com/data5/SELLER/Doc/2023/10/352886946/GB/ER/KW/200261383/guvulafatak.pdfIn PDF document text
    • https://img1.wsimg.com/blobby/go/55d28ff0-9d0b-42b4-8190-887f90038148/downloads/32553030833.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_off000737c8.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off000737c8.bin)
🗂 Part of campaign: shared payload a02f67deb0 41 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000737c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x737C8 16744 bytes
SHA-256: c06d5de1b98ff290097a8e56793834b6ea39c154d5a2284803e06e97959b0c51
font_01_sfnt_off00076346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76346 8940 bytes
SHA-256: a02f67deb084b7ce8e02d7004994a9dd7e3132fe24919a42c6f0df6ed367c188