Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc9ba44dcea4e9c…

MALICIOUS

PDF

74.1 KB Created: 2021-07-13 19:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ae616fcc1f86fb886b6276025800fb1f SHA-1: 2e4d962c5cd2e791e9773bc2ee0bd7bddcbe4c91 SHA-256: 2bc9ba44dcea4e9c59997d535a939706edad9cd799d1c84aa30ca1da59edc90b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ClamAV with a specific signature indicating it is a phishing trojan. The ML classifier also flagged it with high confidence. While no document body or scripts were extracted, the presence of embedded URLs and the ClamAV detection strongly suggest a phishing or malicious content delivery attempt.

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://feedproxy.google.com/~r/razvivatel/yapz/~3/1LSSs5qy-i4/square?utm_term=three+kinds+of+levers
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8e801aa30721e65ec1c26/1625876481213/i_have_blisters_from_sunburn.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8ce15f28789513b647dfb/1625869845671/solving_linear_equations_and_linear_inequalities_practice_problems.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eda9b87daf0c15b06a8d19/1626188216762/how_to_get_a_powerpoint_to_loop.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_off0000c2be.bin
8e1e52906160b6620dbd6969c8153bca8c077096ab00e9cff974bfb63e3bb8b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BE 10312 bytes
font_01_sfnt_off0000d9e2.bin
3207342cfd4732faf6a75c46bfe4a921ae53ce064174dbb778ec9c9c57795593		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E2 16536 bytes
font_02_sfnt_off000104a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104A4 16792 bytes

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