Malicious PDF — malware analysis report

Static analysis result for SHA-256 c725cdc6d1a19f56…

MALICIOUS

PDF

76.5 KB Created: 2021-07-15 13:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 73fccc68c41cca7000ab6b8d150b4554 SHA-1: 828c508e331d48e62f5f196744fc78c2e47746ea SHA-256: c725cdc6d1a19f567360a76ab64b4bec0101eb98566063de7a18033a29395b8d
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a phishing lure, specifically related to invoices or payments. While no scripts were directly extracted, the presence of embedded URLs and the heuristic indicating a payment lure suggest the document's intent is to trick the user into clicking a link. The PDF structure and embedded URLs are consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/mHcMeCcfVl0/square?utm_term=mail+format+for+payment+reminder
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8f44a1b53f2c225e96a7/1626115908272/the_greatest_showman_123.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e78f2b8f757b1ac44cd589/1625788203821/tarot_card_yes_or_no.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_off0000cbb6.bin
e7919f72c0ce61b18d7d752ec63beb7314114e62efc5cbf420d5938bcdd0f813		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB6 16384 bytes
font_01_sfnt_off0000f651.bin
9d34f72c9c2cf4e73c4c65a7d17b309c9779d3f9f5b0a912cc9aaa3896a38625		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF651 10600 bytes
font_02_sfnt_off00010e80.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E80 16792 bytes

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