Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d012395aab878d…

MALICIOUS

PDF

65.7 KB Created: 2020-11-14 20:16:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a54e4f24111abab438282c960e5d2bb9 SHA-1: d66ead79eea0fcb4849bab70073727d955e48cb9 SHA-256: 81d012395aab878d164bef0dd6bd49709d64aef19eb9892326ee49d2b7299667
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'traffset.ru', which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'regular polygon worksheet geometry'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffset.ru/aws?utm_term=regular+polygon+worksheet+geometry
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f8afffed4f06.pdf
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f93fa549d0c5.pdf
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5f8de8ad8606b.pdf
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5f990bb4f1146.pdf
    • https://cdn-cms.f-static.net/uploads/4404755/normal_5f95e657d4018.pdf
    • https://cdn-cms.f-static.net/uploads/4410191/normal_5f94c889d92c1.pdf
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5f8a69879e5a4.pdf
    • https://cdn-cms.f-static.net/uploads/4393647/normal_5f92df62b1f10.pdf
    • https://cdn-cms.f-static.net/uploads/4380083/normal_5fa23c23d6986.pdf
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f8b25bad7675.pdf
    • https://cdn-cms.f-static.net/uploads/4446017/normal_5fa36dbb378b4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vunizi/every_woman_s_guide_to_foot_pain_relief.pdf
    • https://uploads.strikinglycdn.com/files/d46c4c23-9c1b-4a2e-b96d-eba0856000c6/xegubiwe.pdf
    • https://s3.amazonaws.com/nijosinizo/25796818794.pdf
    • https://uploads.strikinglycdn.com/files/0752fb91-09f4-41dc-8a0a-168ff0af2a08/bakivifil.pdf
    • https://uploads.strikinglycdn.com/files/37ae4538-5dc0-4aba-8a36-fdc65f209d7e/raxuf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c254.bin
174ac884d8c78ed74aa28e88c13304e595ab60f7078e60817449093748170d32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC254 5496 bytes
font_01_sfnt_off0000d4fe.bin
cdeb4a70dc608b103159c0f0cf6c2615d2d6c248aa44ba74d71b1533d67d1b87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FE 10856 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.