Malicious PDF — malware analysis report

Static analysis result for SHA-256 941025b85b9c70e3…

MALICIOUS

PDF

66.1 KB Created: 2020-11-22 23:58:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: 30349394acdf39bba21571812f562300 SHA-1: 5c25f25bf8cabd8b609308d8cc36465c56917784 SHA-256: 941025b85b9c70e3233cfcd8342949ac3ef9f5fd6818b218f77e6f5ab58cf3af
254 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to redirector infrastructure designed to obscure the final destination. Heuristics indicate it's a link farm and a redirector, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan.

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://traffine.ru/wb?keyword=exterior%20angles%20in%20polygons%20worksheet%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393908/normal_5f96c2a634e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415974/normal_5fad7bd2d4cde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468534/normal_5fb40c49351a5.pdfIn PDF document text
    • https://dokodajibebabek.weebly.com/uploads/1/3/2/3/132302773/12b63449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412164/normal_5f9ca7454ca6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/68444331212.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/drifting_games_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c572dd8-c3b7-4cec-969a-874fa697f8af/complex_analysis_by_zill.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/vmware_player_64_bit_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/25041026608.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/146a81fb-d716-4716-b292-5085456784b4/space_drawings_small.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_off0000c2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E3 5584 bytes
SHA-256: 19532b58a0c8263d9395c3c4080cd35ff4e4d0d1cfa50a83411dc3b5762be086
font_01_sfnt_off0000d60a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD60A 11048 bytes
SHA-256: a0391359d0cf855b4ebaf542f3ea3ccaf667cd6ef0d753c5c5014a947118b43b

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