Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc16e6c50326b63…

MALICIOUS

PDF

75.3 KB Created: 2021-06-10 12:10:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d00520cc7a4bdb0b3b2b11c78bb2be75 SHA-1: 80867cc7cc4fc58fa73e27d897cedbfeec7f925b SHA-256: bfc16e6c50326b634d1105f186509b2a38d0c99075857c2bfd465c2e1bca5169
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, identified as a link farm, and a primary URL that appears to be a lure for streaming content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/pbw?utm_term=john+wick+3+streaming+filmsenzalimiti
    • https://cdn-cms.f-static.net/uploads/4451561/normal_5fe716b63032f.pdf
    • https://jewefero.weebly.com/uploads/1/3/1/3/131383264/vobegekibujabam.pdf
    • https://static.s123-cdn-static.com/uploads/4490364/normal_5fffb2e735e15.pdf
    • https://cdn-cms.f-static.net/uploads/4414501/normal_6026522c22a50.pdf
    • https://static.s123-cdn-static.com/uploads/4388620/normal_5feb5a651ff77.pdf
    • https://cdn-cms.f-static.net/uploads/4408461/normal_6028c2c360f78.pdf
    • https://cdn-cms.f-static.net/uploads/4447258/normal_6052ad46b8765.pdf
    • https://cdn-cms.f-static.net/uploads/4420222/normal_60387e556cbfd.pdf
    • https://cdn-cms.f-static.net/uploads/4480423/normal_606b084f3d0da.pdf
    • https://suxokigivulumu.weebly.com/uploads/1/3/4/4/134479742/5917858.pdf
    • https://lujipened.weebly.com/uploads/1/3/2/7/132740552/razezipeb.pdf
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/kimufojama_vutiwerana_musafefazusoku_nifuwi.pdf
    • https://cdn-cms.f-static.net/uploads/4459470/normal_6027916ac3049.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jozeluwofe.pbworks.com/f/24926818055.pdf
    • http://wisarazed.pbworks.com/f/tiwixotamewovarugep.pdf
    • http://wenuveraroto.pbworks.com/w/file/fetch/144686520/54386210034.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3d4.bin
a02c31ab033e2d9612cb0bc04777cc113daa1b07efec6d16e9341cea55eaf377
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D4 5652 bytes
font_01_sfnt_off0000f6ff.bin
677e56326ae7158f4d1777c3ab78ad3a40b09dca15d4fcc6bb543263434bef94
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FF 13528 bytes