Malicious PDF — malware analysis report

Static analysis result for SHA-256 784fd343b829da42…

MALICIOUS

PDF

78.0 KB Created: 2021-07-12 20:26:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb336346b4ebf670286466d6f76aa899 SHA-1: 7554e9e53dbd3a3a360b8df624400bf47a17d866 SHA-256: 784fd343b829da42fae711917647369365cc421f25885d93c6c1b33815469fa8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The presence of embedded URLs, although marked as benign, suggests an attempt to lure the user to external resources. The file's structure and detection by ClamAV indicate it is designed to deceive users, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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://feedproxy.google.com/~r/razvivatel/yapz/~3/UQ8tT55rDuk/square?utm_term=blt+without+bacon
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8266528bb5f4f516673d8/1625826917223/5481405135.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8ca02113c6a2e24d82b6d/1625868803037/fan_handbook_selection_application_and_design.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec7a9a7e2b6271615a85c7/1626110618404/social_cognitive_theory_was_developed_by.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_off0000d029.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD029 16792 bytes
font_01_sfnt_off0000e83b.bin
22e19ba46c2b035852907d5e451b7e29e76302e534353bce07f7e28d96647e0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE83B 17344 bytes
font_02_sfnt_off0001154f.bin
39063333e8aef82b2bca9954002411d7e8156b24a3350b72493ad13aa531466b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1154F 10308 bytes

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