Malicious PDF — malware analysis report

Static analysis result for SHA-256 812e7e7a0e20d8b4…

MALICIOUS

PDF

76.5 KB Created: 2021-07-13 16:06:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7d6a46e30ec65aa65f389567f117cc26 SHA-1: 46a9938abce93908bb9dc30bacb85cb8ffa0d569 SHA-256: 812e7e7a0e20d8b4d31d9774af49efed03950d10866792ac818842cecf7104a9
96 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The PDF structure contains embedded URLs, suggesting an attempt to redirect the user to malicious content or download further payloads. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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/nCRFBnYrBHY/square?utm_term=the+magic+ring+story+questions+and+answers
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e9391ce51f1f218d6acb28/1625897244904/domain_group_policy_editor_server_2016.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e78751deaee22ffe7ff9a9/1625786193640/xesegirepekip.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7d1e85eabb22f35da3d96/1625805288690/indian_economy_notes_for_upsc.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e939fe3f195e1e403720b9/1625897470598/limulobodajelexap.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec9b2dc426b81e8301faed/1626118957649/how_to_check_dimensions_of_on_mac.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_off0000cbfb.bin
cfcd5a6088fc80083c0f50a273002a260f3f62cc04bbc0810952ef4090543eae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFB 15804 bytes
font_01_sfnt_off0000f4a1.bin
1a2c3320302bf277cdb40fc6cefbce058375494a326d2026fc5fa8f13118d6c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A1 11180 bytes
font_02_sfnt_off00010e30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E30 16792 bytes

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