Malicious PDF — malware analysis report

Static analysis result for SHA-256 469d12dd73dd88e5…

MALICIOUS

PDF

76.9 KB Created: 2021-07-15 11:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 61286f5b1b5ebc445e3bfb7f552b2316 SHA-1: c39b627f439f87078292e3485eba6359ef3a83b4 SHA-256: 469d12dd73dd88e5f70d458fb8a3f46ba10f38c7247eb3eccade7327becd40fc
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains an embedded URL pointing to 'archism.ru', which is likely used to redirect the user to a malicious site. No scripts were extracted, but the presence of the URL and the ML classifier's output strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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://archism.ru/square?utm_term=gk+questions+and+answers+about+world
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee1f828feeeb055d97b171/1626218370262/1051584485.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec825d288cf71862a972da/1626112605438/41240836244.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edef92b0089c62dc403615/1626206099084/how_to_convert_a_text_to.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_off0000cac0.bin
702f696a1a87e99ee373a851d81dde322e1c158de4ef4d7c62523b06b4b9b928		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC0 16964 bytes
font_01_sfnt_off0000f6f4.bin
b4c1f5798381f3062384c6d85ab48690d03ab78b7e89fc540720d43e334a9ef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F4 10844 bytes
font_02_sfnt_off00011005.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11005 16792 bytes

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