Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b4a847106def062…

MALICIOUS

PDF

73.0 KB Created: 2021-03-03 21:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 01f696e2b18882b687bf4bcd02b4f587 SHA-1: 1456a3227ab7cdbe53f78bdbe530b579e3e7c1c1 SHA-256: 6b4a847106def0629cb20730ffc3eccfff4d41ce9f0fcfe38096080bcaf5662a
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/wix?keyword=wbfs+for+mac PDF link annotation
    • http://gbo.guru/7688518258b0xxb.pdfIn PDF document text
    • https://goxadivitekoze.weebly.com/uploads/1/3/1/4/131437736/3232334.pdfIn PDF document text
    • https://dolepaxutafajur.weebly.com/uploads/1/3/0/9/130969408/9a3150934a42b.pdfIn PDF document text
    • https://difototasewi.weebly.com/uploads/1/3/5/9/135986065/kisexotipubepu_xuzukubunemu.pdfIn PDF document text
    • http://xamagexezuloku.iblogger.org/tizova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485301/normal_60167b6663737.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/zigizuj_popuverijixe_gefafoja.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/hcheihc/35679933634.pdfIn PDF document text
    • https://vebavorosufate.weebly.com/uploads/1/3/4/7/134742301/4c7a80a8691a.pdfIn PDF document text
    • https://gokejubekilebu.weebly.com/uploads/1/3/4/3/134376129/d9b194d7d02b136.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosatezugizixi.epizy.com/baofeng_uv_82_manual_programming.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_off0000e277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE277 5148 bytes
SHA-256: 69bc172f57c82c12a81749aa3dc696bb16e2a54e45bf5fd38b60323ec7d21baf
font_01_sfnt_off0000f3ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EF 10380 bytes
SHA-256: 962949fa91aeb6b16498f28f50f3e31cdf6688990a0e188562cc536d57a2d759