Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce922c34c4063bd…

MALICIOUS

PDF

69.1 KB Created: 2020-12-11 06:49:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cf9158066957210981aa44716959c4e1 SHA-1: 1a38666cd4a052215fa5c90f364094292ca2df16 SHA-256: cce922c34c4063bd0374019b75c31f249b3c403889350a6b40bebbd0fe95cab4
156 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a link farm, directing users to a suspicious URL (trafftec.ru) with a game-related query parameter. ClamAV also detected this as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://trafftec.ru/strik?utm_term=i+want+to+be+the+boshy+game PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4423700/normal_5fab156c1274a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368243/normal_5f8bc486ba680.pdfIn PDF document text
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/xuketezepunafor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_5f9fb1afd8254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421476/normal_5fba26dd6aca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384160/normal_5fbe23335efb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392649/normal_5fb4f30528f7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427094/normal_5fb261ec114ca.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/bcfb122f-7786-42ea-a760-51676512eae8/74179937023.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed8eabfe-cf2d-4bc0-9966-e0ec8df58cda/femezijizirafexus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94278c1d-bb81-45c5-8451-a68cf3dd79af/50483118310.pdfIn PDF document text
    • https://s3.amazonaws.com/nakevoja/ct_coronary_artery_anatomy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e98e0f-3dbe-4afa-af06-ff48f2d56f33/jufokanolavopeki.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_off0000cfb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB1 5244 bytes
SHA-256: ab223dd3f341cbcc23f6c83c91c8b63b43c61008450d9cc1941fa2c87d2e52eb
font_01_sfnt_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 11192 bytes
SHA-256: ca3c13516792e4dd8e310b33cbbe22f71c04e62803c610b57ece504828758a54

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