Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b01a2fc94e0f35…

MALICIOUS

PDF

102.8 KB Created: 2020-11-25 08:11:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-28
MD5: a8452b10426606b5d2a7534577e898ad SHA-1: a1c69ef9ca250d75aacc20cf3b5e5000789672c4 SHA-256: 72b01a2fc94e0f351699d28d6bff4691c926d4c6327414c0abdd620a903cd81f
196 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.
  • 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.
  • 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://trafffe.ru/123?utm_term=crash+%2526+bernstein+puppet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383128/normal_5fa4294b6b519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5fa05471da0e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f89053879e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403273/normal_5fb98a8142846.pdfIn PDF document text
    • https://giximanuv.weebly.com/uploads/1/3/4/5/134526051/fubukemutebuvo_vurovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382780/normal_5f98259248214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413468/normal_5fbdd71ac3fd1.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/b7acd55c768de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470980/normal_5faa1c3024493.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5fa363775eb32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_5f8f2c401bcc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383446/normal_5f8e04a1f3c0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459062/normal_5fb41a9c55005.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/31bf4a02-0d21-4989-b2d5-487f2cc371cc/5685785214.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_off000158bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158BC 4640 bytes
SHA-256: 71c8a57a1e5cbce22cdb3d21ab5b6d6cb66b93b4692cf30e2aa56325a283b274
font_01_sfnt_off00016867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16867 11260 bytes
SHA-256: dff26111e258c2dfff2a262a4c6c3421913701388ebf8d9d281f6b089cd2cc01