Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ab3b3bf5446c47c…

MALICIOUS

PDF

73.8 KB Created: 2021-07-20 03:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cd6dcb5bdf30c5527f057ba85ec92f7b SHA-1: 8f087f1302a83c0d8dbd4847f51b9a8ada2b71d8 SHA-256: 8ab3b3bf5446c47cbf2a6b1d204cdbe4293b65bed4b83605a5447e379451550b
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains embedded URLs, one of which is associated with a known phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it is designed to redirect users to external resources, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier clean score 0.2401

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/um1bUVUAM38/square?utm_term=the+definition+of+trudged
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7d95cc97682122421950/1626111381571/mobile_movies_mp4_2020.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca918831aaf5e928debc9/1626122520901/tijonoranirux.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_off0000bf1c.bin
7c40234bb563fb5fa5667a2914c1a150580d263dec756c03122a7850b2e1a2c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1C 10320 bytes
font_01_sfnt_off0000d612.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD612 16792 bytes
font_02_sfnt_off0000ee24.bin
32c9dd73d864cfc4eb1187906b05bc132463d00dc12e07569b6a91adf53eb597		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE24 17108 bytes

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