Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfb037560de2178b…

MALICIOUS

PDF

73.1 KB Created: 2021-02-26 15:41:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 46cc1a0479cfab6b1ef89d3b5dae856c SHA-1: 48b5f4ec0b77c7703d008f81ad9c6a61472e3589 SHA-256: bfb037560de2178b48fa963c9f4c0a05e7d4d41a72df1a9c68393c62fb1dd2ee
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jacksth.ru/award?keyword=2000+7.3+powerstroke+fuel+bowl+rebuild+kit PDF link annotation
    • https://cdn.sqhk.co/besudamuge/1Xhiiee/59800756281.pdfIn PDF document text
    • https://wonelapafilujol.weebly.com/uploads/1/3/1/6/131606162/fodavuka_dusefuvez_zanuxofikovexaz.pdfIn PDF document text
    • https://noruvejepemapab.weebly.com/uploads/1/3/4/7/134702548/91a5fbab3.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/tuwagizikelo.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/87223224156.pdfIn PDF document text
    • https://cdn.sqhk.co/fuvebopeweb/NJkgdUT/wood_cutting_boards_walmart.pdfIn PDF document text
    • https://tubolapibakosi.weebly.com/uploads/1/3/4/8/134872187/jutikime.pdfIn PDF document text
    • https://bupimapigi.weebly.com/uploads/1/3/1/3/131383283/305232.pdfIn PDF document text
    • https://fezulenigi.weebly.com/uploads/1/3/4/4/134485980/f07cd.pdfIn PDF document text
    • https://gojafone.weebly.com/uploads/1/3/4/8/134891791/63eeebccf90500.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/farowug/93325776029.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A5 5576 bytes
SHA-256: 5f2283829883b9545e14e3bdfe254f3dd76e51bb7bab5276142f1f5e57f6b73f
font_01_sfnt_off0000f3cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CD 10448 bytes
SHA-256: aa57c32e1ce5578c81660c5af0d609516c5014f044d61f055bb78e0a8bd8cc6a