Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46e7cdda6e0941f…

MALICIOUS

PDF

82.8 KB Created: 2021-07-12 22:07:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 558df562834ddd5e5a660c15a5cc9101 SHA-1: dbb5b2be5eb2a070e090715137e47a64d753f435 SHA-256: f46e7cdda6e0941fdece26116e4b66a7f42c98c96155ef1b10be4c610a8e7b7b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. Although the document body is heavily obfuscated and unreadable, the PDF structure and the detected URI suggest a phishing or malware distribution attempt. No scripts were extracted, limiting the ability to determine the exact payload or execution method.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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/sq/ugae/~3/CcIy6vlvkUk/square?utm_term=shaders+for+minecraft+pe+2020
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8be9c1b22c82f862c9a92/1625865884571/29260600784.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e863291dd7c51c1b2b95ab/1625842473202/learning_from_data_yaser.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8c48478ebe26bfc602f4/1626115144910/the_ugly_truth_full_movie_123movies.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec81385f604029b9913dc7/1626112313073/current_state_map_lean.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_off0000deb0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB0 16792 bytes
font_01_sfnt_off0000f6c7.bin
22238626ed8f792487f8152c535dbcea542213c1304b3a0f37abac858eb0522f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C7 11156 bytes
font_02_sfnt_off000110af.bin
f131101513a5a5fa42c36ac2092f717766e99d25184ab2544bac1ed2d433f7ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110AF 17480 bytes

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