Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e3f79bf7a93b31a…

MALICIOUS

PDF

74.4 KB Created: 2020-11-29 09:35:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-20
MD5: 9e77a6a744c546d48aa00c98329fe898 SHA-1: 3ac176447e75c8fc511dbca094f761a0ef9e8ee8 SHA-256: 4e3f79bf7a93b31af29217f09419960ca8b2e9baa538dc0dbb9106c54efdfb37
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://gettraff.ru/123?utm_term=cash+receipts+are+posted+to+the In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5fc032579c0bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_5fb7a6df7fea5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5fbf23859e400.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392218/normal_5fb5f527a5a2b.pdfIn PDF document text
    • https://wevupifusa.weebly.com/uploads/1/3/4/3/134356286/fudezudubedulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489988/normal_5faef45d6bd54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_5fc107b0a31b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447079/normal_5fc05201ef257.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_5fa10bbb1abcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392861/normal_5f9b7b2b7c7c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_5f9ce8e202608.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_5fa588fd9f355.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/1495f70a-6041-47b1-9108-9641f50fd0dd/16870380135.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/fender_super_champ_xd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/404003ea-ed6a-48a4-8831-96302ae2e1a6/it_ends_with_us_colleen_hoover.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_off0000e89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89B 5036 bytes
SHA-256: 130eb081341a67768be02cd129a371732feb716f047c4511db0450b40e85f6c0
font_01_sfnt_off0000f9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AE 10196 bytes
SHA-256: c9ee1fa44cb98f9294410f819e2a934a592fda8afd390202311867457471786e