Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdc07bc891ab834b…

MALICIOUS

PDF

75.1 KB Created: 2021-07-17 10:56:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 290a0b408ee9981660c66fbe6790e57c SHA-1: 44219911ef56c7e1a1a9a79ee5375bb725f46785 SHA-256: cdc07bc891ab834b751d1015a98f01309e66e0f671a64fbaa258710ebe1728da
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. It contains multiple embedded URLs, one of which is flagged as a potential phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/razvivatel/yapz/~3/1LSSs5qy-i4/square?utm_term=love+knows+no+bounds+chinese+novel+pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f23634efed6b61d4753993/1626486324810/pumpkin_cake_with_spice_cake_mix.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee71bf537273346e32e2f0/1626239423771/2126521756.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_off0000c954.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC954 16792 bytes
font_01_sfnt_off0000e16b.bin
a5c5880484c4c700f14cef2e15ca0c382bc85dd7cfc0e2d895e5cd9909fa0777		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE16B 10796 bytes
font_02_sfnt_off0000fa07.bin
ee422ecb06a9798a9d1dccfa0fd99124c8240df4609bb1749f8f1487c4c4ab6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA07 15200 bytes

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