Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc6f6824028e5db…

MALICIOUS

PDF

82.4 KB Created: 2021-07-15 20:58:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0369dd24c8aa8c74abe11af2d3e99cc3 SHA-1: f8df66f16c8c04dd1d4259ad339b063b2231055a SHA-256: 2fc6f6824028e5db4a2ff47cdd4d2312ddf43f16d06910383de074903df1ce35
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests a potential phishing or malware distribution vector. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9473

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/sq/ugae/~3/-MXWpcYQ7kA/square?utm_term=come+down+bengali+meaning
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60edee9ce55429721e22dba0/1626205852969/2007_secondary_solutions_to_kill_a_mockingbird_answers.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60efcd78d9659e278644009f/1626328440904/50877093425.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec87d02de985067773f763/1626114000217/22183694219.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7fb07f4d7c53d8b146d6a/1625815815671/93759739479.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f02980a9bc231ac1d10781/1626352001252/55851547493.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec8d4cf83a7f26ecd1463a/1626115404779/gumakurojag.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60efda2d96309e3685a9226e/1626331693161/what_is_pause_break_on_a_laptop.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edac7b76150b527e9c586c/1626188923481/91068573006.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_off0000e0ef.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0EF 16792 bytes
font_01_sfnt_off0000f901.bin
a82d11c84338185bcde5b9c907fa2342257b06a8658eb947265c135cf4c7bfac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF901 16724 bytes
font_02_sfnt_off0001246f.bin
b5a6b21e25dc41ad0b35f672c12163b1457ae12bc98ba50dd62c4960e1131c03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1246F 10484 bytes

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