Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e2a17995e43b08…

MALICIOUS

PDF

83.6 KB Created: 2021-07-15 13:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f0bacd33b812d4fd001f104fe2ebe1cc SHA-1: 9d75eab3b1b451b3f6da65bca9592126379d4b6b SHA-256: 67e2a17995e43b08f597016494e8d94ce07c74563ce8610508f42ea8648eb3d5
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that exhibits characteristics of a phishing lure, specifically a fake invoice or payment scam. It contains embedded URLs, one of which is associated with a remittance form, and heuristic detections indicate it's a callback phishing lure. Although no scripts were directly extracted, the PDF structure and heuristic firings strongly suggest a phishing attempt designed to trick the user into contacting a malicious actor.

Machine Learning

  • Nyx PDF Classifier clean score 0.1630

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/jEScUJLm1bs/square?utm_term=monthly+remittance+form
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60effa2f7fedc2490c09f4c3/1626339888149/homelite_26ss_trimmer_manual.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_off0000e6c1.bin
34d214a8f2d38c3cacf8695833e5ca50bafc490f48bf1e46d8eb90e1b65e1aa2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C1 10540 bytes
font_01_sfnt_off0000fe9a.bin
1d621857943b9fe126b295e45abebaf3f1268478e103afe3aec88c7e89ac5b6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 16972 bytes
font_02_sfnt_off00012af2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF2 16792 bytes

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