Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c24bba59d6120a…

MALICIOUS

PDF

75.5 KB Created: 2021-07-14 04:27:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9c3a25abd37b29919558ae5a9cbf125 SHA-1: b5dcb78a44022e8bf5b1ff32a80c284031cad25b SHA-256: f0c24bba59d6120af125c6c8a8b19ef4fc0483c4daeb9058cb48cc033a0be8e4
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains an embedded URL pointing to a suspicious domain, which is a common tactic for phishing lures. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3002

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://drafthe.ru/square?utm_term=jingle+bells+song+on+piano
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee1a758feeeb055d974282/1626217078197/tivuzop.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8ea59f492d21a0f684f9b/1625877081747/how_many_days_does_goldfish_eggs_hatch.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_off0000c544.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC544 16792 bytes
font_01_sfnt_off0000dd56.bin
2454d15898ef1d24958d06e8e94ae28c73a134ff27378e42f1401fa42527a937		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 16936 bytes
font_02_sfnt_off000109c2.bin
90068d990475215bba6beb26fe1976cad72e5936138e3ed63db82294f30ba7ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109C2 10360 bytes

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