Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2fae9562486809…

MALICIOUS

PDF

76.0 KB Created: 2021-07-15 17:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff76dd6b17887969fb537b662454a32a SHA-1: e193fc77fa6cdb245d6c8d0d97df2df0071af3e5 SHA-256: 1f2fae95624868097a75350884921e985aea9df480b24933b6b730a2ec5ef08b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to external resources. The PDF structure and heuristics point towards a phishing or malware distribution vector, likely leveraging embedded JavaScript to facilitate the attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9214

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/AG-UZpNbJGc/square?utm_term=observability+in+control+system
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed8e60f95b5524f9552aa2/1626181216856/elements_of_operation_strategy.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee5be8e03b615e09901201/1626233832562/78974473508.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7b63154eb17b6849286a/1626110819930/75568186110.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e940af085b1c120f992eac/1625899183696/at_your_feet.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8f992f492d21a0f6934e8/1625880978944/gipagevuta.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee2c21fc191471fc6b51be/1626221601811/7358950547.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee5cb986aa876280beac11/1626234041434/scabs_on_your_head.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_off0000ca41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA41 16792 bytes
font_01_sfnt_off0000e258.bin
1039584b29ed2e9df3f748f14d4125e8eb9d6274bb7b3f2ece0d528834297a8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE258 10736 bytes
font_02_sfnt_off0000fb13.bin
ebff38bbb2da994ee7462cdbebf4709d1a0af698978af1e4c9203f8c560818e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB13 16008 bytes

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