Malicious PDF — malware analysis report

Static analysis result for SHA-256 146040ca06a1ab4f…

MALICIOUS

PDF

118.4 KB Created: 2021-07-14 01:11:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 37064f6119708c5960f8f5c728d0966a SHA-1: c4dea7a3d1087d6cc90a61dccd77433f1ac610a3 SHA-256: 146040ca06a1ab4f5ed97289f794f97de23534b7e67155804046690146af89e1
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains an embedded URL that, while currently flagged as benign, is indicative of a phishing attempt. The PDF structure itself is malformed, with duplicate object bodies, suggesting an attempt to evade detection or obfuscate malicious content. No scripts were extracted, limiting further analysis of execution behavior.

Machine Learning

  • Nyx PDF Classifier clean score 0.2210

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/razvivatel/yapz/~3/kVSxLQpkboc/square?utm_term=a+pilgrimage+is
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e78a6b6d117d6eec9f29ba/1625786987441/right_side_up.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e906d43f195e1e40354d89/1625884372507/59227123671.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edb30c5dd1eb1c2908b9ad/1626190605050/physical_education_marking_scheme.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60edd176cb43530604a6861e/1626198390756/36683184367.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda5a1a5c02c6ff4db21a5/1626187169240/88408296078.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00017eed.bin
c4e46836503596aef7bb6516a6d3a9cc51f856a38043c2974149af279978f728		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x17EED 19032 bytes
font_00_sfnt_off000122a6.bin
00c38f67de2e512b9a5989eaf942491e117f2c47734a3d78b4fa6d419caa54fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x122A6 13456 bytes
font_01_sfnt_off00014a77.bin
f0b2aa8ae20928d2dfa95c72d7c85799742da4a623df4fd793951d67821e96db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14A77 20928 bytes
font_03_sfnt_off00019dcc.bin
e3dab4ba73abc9e906496aef66f6ca1bb8e68615d5cfecf72e1d0c6ff19bedac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19DCC 10256 bytes
font_04_sfnt_off0001b4d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4D1 16792 bytes

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