Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2eafe3c7dc6af08…

MALICIOUS

PDF

73.8 KB Created: 2021-07-13 20:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d55712a9f3f556ee0893903a26aba3f SHA-1: 2838e06c6c8d03ccb2a0fc6bfc9817d5cbbff1fb SHA-256: e2eafe3c7dc6af08e0851a28edf70a9acf50c8f51cf5e2596ba7a02b09fb1620
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a PDF phishing trojan. An external URI pointing to 'crewmak.ru' was extracted, suggesting a redirection to a malicious site. The PDF structure and embedded content, though heavily obfuscated, indicate an attempt to disguise malicious intent, likely through a social engineering lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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://crewmak.ru/square?utm_term=color+code+personality+test+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ed067eeaa19e084bbbe748/1626146431173/problems_and_complaints.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edb63bc2b60e0ed5b73833/1626191419163/nupujebelajubuseru.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_off0000c2c3.bin
9ad1ec59fee1530e6fedf6ff2d835d62d2922457bcad90fd68fa0619f265de75		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C3 10756 bytes
font_01_sfnt_off0000dba4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA4 16792 bytes
font_02_sfnt_off0000f3b6.bin
f4d22bbb81deb8da627fd1c67056d12dabe97e050370595141d9c29c097e9e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 15584 bytes

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