Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa26c1762f36253f…

MALICIOUS

PDF

83.5 KB Created: 2021-07-17 07:01:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc1bab1fdf229b59b65538a792445859 SHA-1: f69b1bfa3106bd9302f47b5e283ad491aa0868c3 SHA-256: fa26c1762f36253f16e7c663bd91913d4b1161e46b0cd66cc06933e9c80444f8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that point to seemingly benign content, but the overall structure and detection suggest a malicious intent, likely to trick users into clicking through to a malicious site. No scripts were extracted, but the presence of embedded URLs and the ML/AV detections indicate a potential phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

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://feedproxy.google.com/~r/sq/ugae/~3/k6oGaauGqGM/square?utm_term=lion+tailed+macaque+endangered+species
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8d66c2b0f0e19af677f68/1625871980994/6908553780.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8bdd4c0e666153b73fb75/1625865684941/difference_between_enhancement_and_depletion_type_mosfet.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eca0c951a87c5d75ae9541/1626120393339/26149604589.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e568.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE568 16792 bytes
font_01_sfnt_off0000fd7f.bin
0e28a67192e3de55d9529b31c28ef0fc094e5dea3a8b7be3ac3292cb1ce76c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 11060 bytes
font_02_sfnt_off000116ac.bin
dc24c19d7dd97ce6657576dc028df809343d6e46f4e18e4a469773d58e11b9b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116AC 16668 bytes

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