Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6fab697113eb496…

MALICIOUS

PDF

80.7 KB Created: 2021-07-14 01:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 63fb1c21a1b5f85026bb31dc4e791800 SHA-1: ff47bbaa5e04c2e4be05df3a27a4b407a32a5e06 SHA-256: c6fab697113eb4960c5e0296021a13fad779b1026d4e67fa47cb37e11b272802
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URI pointing to a URL that, while currently marked as benign, is suspicious in the context of a malicious file. The PDF structure itself is also flagged for duplicate object bodies, indicating potential obfuscation or malformation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

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/-7-cX3opz_8/square?utm_term=ups+supervisor+test+questions+and+answers
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec893f3a853d606aed226d/1626114367813/99068895361.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e77ef7627e690f0ed5a5d8/1625784056026/kotuselutaxi.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e919d32210ba6bce11d903/1625889235398/manufacturing_process_book_for_mechanical_engineering.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_off0000db0e.bin
10bdd4f07c14fcc8adb22d313d944db6fc09eb90670f8a6fc6459ffff289b503		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB0E 10744 bytes
font_01_sfnt_off0000f3bc.bin
87e1f017c433df64e035011404f26b43e05d724c942ca0d4a28d30592fb76976		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BC 16504 bytes
font_02_sfnt_off00011e94.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11E94 16792 bytes

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