Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3cc27d8c5d36710…

MALICIOUS

PDF

84.1 KB Created: 2021-07-13 23:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6960afe304e7bf0e49f5b44969e0ee45 SHA-1: 9f1ea9e6c32e1e99c7151bde6c951c973e3ba41a SHA-256: f3cc27d8c5d3671044f9a891da2d0ebcf9c4911e234787ee4eb26f28827744cb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing an embedded URL that points to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, specifically indicating phishing and trojan characteristics. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8298

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://krisoc.ru/square?utm_term=nope+meaning+english
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec819abdd82073f6fede3e/1626112410267/august_act_date.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edd479a4137771ba00db35/1626199161842/need_for_speed_rivals_download_free_full_version_pc.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ed2dc866c2900cf55e470d/1626156488296/mobaworotij.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7a83686d8930991a38a58/1625794615101/are_all_hickory_nuts_edible.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec79af12c1416d2f19c5c1/1626110383996/3448421508.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_off0000e444.bin
51d3c4703f6ca0d6445ae3d8d90830d21877ee0d859139bdc3711a88084bdb0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE444 17876 bytes
font_01_sfnt_off0001136c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1136C 16792 bytes
font_02_sfnt_off00012b83.bin
69787782d60b59580f5deafd993b1b9c9858a51f789f19bac549a8827de81bd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B83 10480 bytes

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