Malicious PDF / .VIR — malware analysis report

Static analysis result for SHA-256 4514f93756ea0369…

MALICIOUS

PDF / .VIR

405.1 KB Created: 2023-10-13 13:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2024-07-23
MD5: c682130cd1c471856f88b7ccb77794da SHA-1: 19a376b5ab5d8b5598e7bde4a3f2dfaacf2ee596 SHA-256: 4514f93756ea03699103ea182b485a26c17aaf2f254a031bc435fb452bbaa60a
146 Risk Score

Machine Learning

  • Nyx PDF Classifier clean score 0.0421

Heuristics 6

  • 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.
  • 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://jileguf.yenene.co.za/249731885990345824018?kusuratixabovumumikotudamisowovuxufomaxarazexagopuregonifuvolefifapufamesegajujujatuxoz=xomesojawanoruzejogivebijenogikejufosazopapanekawidibobidipodosajobufidotatozimuburafovuxomasidiwinulasutulesalipujavujivunotilasulobadamodowibotejimelogujazuwopetuzegovezovijerorigoxakezoganujumukemem&utm_kwd=the+suffix+ful+worksheets&volipikugogurezutuzubukiladinupanepisofokuwukopanapajirusoxolunimimadibato=lusiganodadepuwoxexelafupifuzekanotijepovizexevoweruloziziwewigipediwerikavatupovemaludadedawunodebelobofowipupubifevasopusafudinuranuged In PDF document text
    • https://jileguf.yenene.co.za/249731885990345824018?kusuratixabovumumikotudamisowovuxufomaxarazexagopuregonifuvolefifapufamesegajujujatuxoz=xomesojawanoruzejogivebijenogikejufosazopapanekawidibobidipodosajobufidotatozimuburafovuxomasidiwinulasutulesalipujavujivunotilasulobadamodowibotejimelogujazuwopPDF link annotation
    • https://jileguf.yenene.co.za/249731885990345824018?kusuratixabovumumikotudamisowovuxufomaxarazexagopuregonifuvolefifapufamesegajujujatuxoz=xomesojawanoruzejogivebijenogikejufosazopapanekawidibobidipodosajobufidotatozimuburafovuxomasidiwinulasutulesalipujavujivunotilasulobadamodowibotejimelogujazuwopetuzegovezovijerorigoxakezoganujumukemem&utm_kwd=the+suffix+ful+worksheets&volipikugogurezutuzubukiladinupanepisofokuwukopanapajirusoxolunimimadibato=lusiganodadepuwoxexelafupifuzekanotijepovizexevowePDF link annotation
    • 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_off00061017.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00061017.bin)
🗂 Part of campaign: shared payload a02f67deb0 41 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00061017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61017 8940 bytes
SHA-256: a02f67deb084b7ce8e02d7004994a9dd7e3132fe24919a42c6f0df6ed367c188
font_01_sfnt_off0006222b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6222B 14732 bytes
SHA-256: 1a9305f0b9f7898bb175072d3afbd40e7381b2325b86d7b7ee84f17d9df58f32