Malicious PDF — malware analysis report

Static analysis result for SHA-256 92258cd9fbca81bc…

MALICIOUS

PDF

74.4 KB Created: 2021-07-13 09:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4d3eff2f2bba2d478fbf40f8f0c5584c SHA-1: dc87b91af8992ab0c34cbc65f4058a1453cfe79e SHA-256: 92258cd9fbca81bc7779ed7688afea41ed5ef42954e5fc3da623e6bc6a5196b9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An embedded URL points to a suspicious domain, likely used for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, possibly for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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://huntic.ru/square?utm_term=swag+se+swagat+hd+video+song+download
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecda51068930398393a733/1626135121775/bexunosop.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60eccad6e5c9c06b2eb5aecb/1626131159483/witchery_rite_of_remove_curse.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e768b4ae6cb774a92613a1/1625778356717/58040303266.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_off0000c1fb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC1FB 16792 bytes
font_01_sfnt_off0000da0d.bin
a8fbaa6567c99754d67ad415c636bc3e14ad7b78db432e1e5d70d96d75bcc6b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0D 16744 bytes
font_02_sfnt_off000105cb.bin
603047f574744d070b0b1c0175293b63b104e24238573f47bd15c8edd582a91a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105CB 10656 bytes

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