Malicious PDF — malware analysis report

Static analysis result for SHA-256 65953f1ec09be4c1…

MALICIOUS

PDF

75.9 KB Created: 2021-07-13 21:50:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 042d15343a62867959e2b0b6838ba4f9 SHA-1: 7e4e8b6bd56190bb3f5276bd3b8b9e8c7e11f348 SHA-256: 65953f1ec09be4c107d3076f7dc31174607b5e67ea3856c0e07639ad292e3428
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature, indicating a phishing attempt. The heuristic 'SE_URGENCY_LURE' suggests the document uses language to create a false sense of urgency, a common tactic in phishing lures. Although no scripts were extracted, the PDF structure and the presence of embedded URLs point towards a phishing attack, likely intending to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.1538

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/razvivatel/yapz/~3/nCRFBnYrBHY/square?utm_term=question+answer+of+geography+class+10
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e933292c5c2f6215c9a660/1625895721503/7_days_console_commands.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_off0000c613.bin
ec14a6350dfb649a742bb7ba51fff91392f87e0bea1050485fa1c4b6950b3d26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC613 16516 bytes
font_01_sfnt_off0000f111.bin
82a2ee74b7b7fcf3295914ba3def8851974825c5b45f2401caeba141d3d19ae9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF111 11292 bytes
font_02_sfnt_off00010bce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BCE 16792 bytes

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