Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa7d956654939917…

MALICIOUS

PDF

76.0 KB Created: 2021-07-13 23:11:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bfe9db280d72f5a3a4cab6103f6bb12a SHA-1: ebb7927fbdf45104d9c64d634ea9d66d0c636bde SHA-256: fa7d956654939917d78a3b0038793bf001d1259ff872dcf583249db620db8f51
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. An external URI pointing to 'huntic.ru' was extracted, suggesting a phishing attempt. No scripts were extracted, but the embedded URI is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7395

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/square?utm_term=amazing+grace+bag+pipes
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec8becef188817f7e23d9a/1626115053114/play_pacxon_online.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8b261c4a7166ca665bf9e/1625862753759/40118094652.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8ec62f229ba2ea8349779/1625877602890/new_reformed_orthodox_order_of_the_golden_dawn.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_off0000c77f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC77F 16792 bytes
font_01_sfnt_off0000df91.bin
1b0972cc1530e660139b13328e55bc3421382f306a6268ad2cd42f65c8f831d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 16636 bytes
font_02_sfnt_off00010ae5.bin
fc852098a1bdeb7a023b83c664bfd0e944a43aac4d9e2e2f5a2490ff499cace3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE5 10632 bytes

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