Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7813cbf39bdd7ec…

MALICIOUS

PDF

75.1 KB Created: 2021-07-16 14:40:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bd21a4cf974e4b1a26ca245342e1e13f SHA-1: e88ccd0480ef91101ae3378005302cee9f90d6ed SHA-256: d7813cbf39bdd7ec052570592e204b2499ae0f0caeb9cb96af91668b07ad3d38
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified by ClamAV as 'Pdf.Phishing.Trojan'. It contains an embedded URL pointing to 'https://irlanc.ru/square?utm_term=us+energy+department', which is likely part of a phishing lure. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the presence of a phishing-related URL and the ClamAV signature strongly suggest a malicious intent to trick the user into visiting a compromised site.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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://irlanc.ru/square?utm_term=us+energy+department
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60eddd3e3be50f2c5dad76d9/1626201406793/kafidal.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee7ab9462f394a1e45b4c0/1626241721207/ketarezijiren.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_off0000c28f.bin
d755ee12368dc9e62181db099bfe2b4cff0dba9921eb198f5ba7f99d0db8297c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC28F 17736 bytes
font_01_sfnt_off0000f12f.bin
cfa43fc2d1088e15f99ce1f1fceec98ba64979314b625789376bee5070d369ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF12F 10600 bytes
font_02_sfnt_off00010939.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10939 16792 bytes

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