Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd78afb4b3ab1dee…

MALICIOUS

PDF

69.4 KB Created: 2020-12-04 17:55:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-18
MD5: f9029d4f50fbb29cba5bf58bd96cae5d SHA-1: ae5c8e7f449f7f195476eb2ddaa37b5e5ae85aff SHA-256: cd78afb4b3ab1deea8947c85e2573daad6079a8a863d8ebddac1b538d6c06946
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://cctraff.ru/wb?keyword=ac%20market%20apps%20%20apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459180/normal_5fa1780659aea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403814/normal_5fc2b91f16f01.pdfIn PDF document text
    • https://lukimozogu.weebly.com/uploads/1/3/4/6/134638062/donesakew.pdfIn PDF document text
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/rosifuzisagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_5fc06b01bd8d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374698/normal_5f90ce3a4aef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409826/normal_5fa4b6a8199e2.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/9be49eb89d1b10.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/59005ea7-1c03-4656-b673-1727cc5a71eb/eufora_volumizing_shampoo_ingredients.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfdb415687f52b6b7b2913/t/5fc3b43bf81c9a2a0c131e50/1606661181538/jezavewe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc006d0104edf1d777bfbd4/t/5fc25e223f75b1664320d5d8/1606573603508/87351370725.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf62eff3de5e49b55c47e4/1606378224370/nagazamutit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd32f8d9-2c49-4707-bc1e-8ccea7817daa/negepenaporore.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB43 5100 bytes
SHA-256: fc4baddf64a4270c4f7eeea290a2deb2ea4d6c1756922e05a1c020b19315a02d
font_01_sfnt_off0000dc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7B 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000e508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE508 10528 bytes
SHA-256: 58bb0c9132a99739e17627e6a7ca679c9804e65fbadf29fb66cb8db9d51d62d9

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