Malicious PDF — malware analysis report

Static analysis result for SHA-256 481e5933131a7224…

MALICIOUS

PDF

89.0 KB Created: 2021-07-13 09:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8855aa65b466207505bfb7fce73ccfeb SHA-1: 2a388be2853b2f5b2d93b1438f7adf4e5c528550 SHA-256: 481e5933131a722445e862661479650b5cc8048ba7c0bfacf3ca011241ad6c22
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains an embedded external URI pointing to 'https://archism.ru/square?utm_term=justin+law+soul+eater', which is likely part of a phishing attempt. The PDF structure also shows signs of manipulation with duplicate object bodies, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.0819

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://archism.ru/square?utm_term=justin+law+soul+eater
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8509680f53003db1f99d2/1625837718442/samapafuvijo.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed250c4616123fc5f7ea9f/1626154252631/mojigivijupaj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaba.bin
cfb35ae873259e833170415576c0d8b0718d5bba45bffcc036a76ecaf4c0b4ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEABA 10280 bytes
font_01_sfnt_off00010213.bin
f232b5b4970efbf1b17ad272c0e1081e4cb2afe3939e96cafba6c95e8d53dffc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10213 17776 bytes
font_02_sfnt_off0001304f.bin
9d654acbabffcf94d3ecf5d50beaa778f50cbbea8b359777aecd30eeba950feb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1304F 4036 bytes
font_03_sfnt_off00014006.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14006 16792 bytes

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