Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6d3667a33d9de69…

MALICIOUS

PDF

187.6 KB Created: 2021-07-18 15:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c05837a7482261956e632743ee4e49a0 SHA-1: 614a90870c2015cf1df421a7812038583a4f25e0 SHA-256: f6d3667a33d9de690ffdee1cc4e5bececdaa2bb3ea894a8d94fbe9e3ae5f334d
66 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ClamAV, specifically flagged as 'Pdf.Phishing.Trojan'. While the document body is heavily obfuscated and unreadable, the presence of embedded URLs and the ClamAV detection strongly suggest a phishing or trojan delivery mechanism. The primary attack vector is likely spearphishing attachment, leading to exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3382

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/RVI1sXQGPkU/square?utm_term=desperate+housewives+bree+hodge
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7d0dbdd82073f6fe60bd/1626111245230/69195429540.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f232149c57c249392ff09a/1626485268962/30000_cm2_to_m2.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee3ef4db6052518ec6a38c/1626226420800/bay_window_leaking_from_top.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f10e37e013e242e71320dd/1626410551269/53966784921.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_off00028408.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28408 16792 bytes
font_01_sfnt_off00029c1a.bin
549d7815dabdd2bdb55268b12d23d6c0a36a0f49c0ba2ccb46ac0295b24c4640		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29C1A 17208 bytes
font_02_sfnt_off0002c913.bin
9fbeea854a8a440a881a2c87385dd4ec1452617a26de307b116be05378f021be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C913 10916 bytes

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