Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa50c6b8a97e435…

MALICIOUS

PDF

75.2 KB Created: 2021-07-16 22:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 56681baf0af0cdbcb889b90e19cc5d18 SHA-1: ea58da11a2a69e1f19fe4f8e918fc55db22ebb5a SHA-256: 6fa50c6b8a97e435db4ae4aebfffd9d4aaddfa7252818f8ec043adc8da11c3a7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URL that points to a potentially malicious resource, suggesting a phishing or credential harvesting attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into visiting a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/gOBB6uaVNRA/square?utm_term=gay+male+69
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee8f1e0a53c127f5dcdd50/1626246942275/the_culture_excession.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edf61130d23a75506602e0/1626207761661/control_plan_examples.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c5fa86d8930991a53e4c/1625802234659/30399748742.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_off0000c920.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC920 16792 bytes
font_01_sfnt_off0000e137.bin
b342821d6da3447c5fc4601e0938d629d55a593119e587c6c65cfe743b343602		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE137 10076 bytes
font_02_sfnt_off0000f7ad.bin
8a836faf7fb2e13f54e1997b460b2a09b3a58bb97e42fdc0b3347b82b7430c87		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7AD 16220 bytes

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