Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2afe823abe7d59f…

MALICIOUS

PDF

74.1 KB Created: 2021-07-15 17:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f23d0e20389f55f2829308b43d28b6dd SHA-1: 9b6abe61df39f873c4a5be3ce0ea4710f4ea42f7 SHA-256: f2afe823abe7d59f79bd495660304a639382f65c8b1e8065daeaaa487a36a99b
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. An external URI was found embedded in the PDF metadata, which is a common technique for phishing lures. While the URL itself is marked as benign, the overall detection suggests malicious intent, likely to direct users to a compromised or malicious site. No scripts were extracted, limiting further analysis of the execution chain.

Machine Learning

  • Nyx PDF Classifier clean score 0.2156

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/~3/5VO7y1TeAqQ/square?utm_term=photoshop+template+for+instagram+posts
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec88d8947cc46ca12927ef/1626114265304/kiduxorikovebavugurat.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_off0000bf82.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF82 16792 bytes
font_01_sfnt_off0000d799.bin
1377f1c13ccc5d1445122036ef2455087e47b6ededa59e2885de387940933bbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD799 10804 bytes
font_02_sfnt_off0000f050.bin
3dd8db95f52ef124f08b32ef1c26ba1bee3c3140fb83acef812350b95f4893df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF050 16484 bytes

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