Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc56c262887b954…

MALICIOUS

PDF

94.9 KB Created: 2021-07-16 20:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8bfff30ab1ff9cfacd821d4741ef1ee1 SHA-1: 352e8a08e2f902b69fcf1aaa613192a4c873b24a SHA-256: fbc56c262887b954f364c26c6f6e9a812842fb1cf256265c449ead044e0f3783
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI pointing to a suspicious domain, flagged by heuristics and ClamAV as malicious. The ML classifier also indicated a high probability of maliciousness. The presence of an external URI suggests an attempt to redirect the user to a phishing or malware distribution site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6187

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://drafthe.ru/square?utm_term=community+disaster+management
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8cc296f0e2d629ec05591/1625869353308/zowidumazisopo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f159ae8bcf896c916101c2/1626429870495/wuzupinenidebal.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a61797884458c99ea853/1625794071899/wupaxurenulomijolubozimi.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_off00011377.bin
cc376ab8f55cd8ff2ca45f0c999dd5cbc2d8103539c44ba5961e6491083aa5bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11377 16768 bytes
font_01_sfnt_off00013f07.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F07 16792 bytes
font_02_sfnt_off0001571e.bin
f4469cf8dcfbc4162fb36e64320884c9bee43dfdb00cbd06518c6743f7731192		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1571E 10792 bytes

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