Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ad8175cc40e8dc9…

MALICIOUS

PDF

88.5 KB Created: 2021-07-16 21:15:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9123311d66022dd18a4e806544e73ee7 SHA-1: 49e6c6d06a309e78f659fd386e3bfa4a2623e3b3 SHA-256: 5ad8175cc40e8dc9d90804649a5ee241f58ec60bdba1723ea1a58e9d72076a5c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. It contains an embedded URL that, while currently flagged as benign, is indicative of a phishing attempt. The PDF structure itself does not contain readable content, suggesting it's designed to exploit PDF viewers or deliver malicious content via embedded objects.

Machine Learning

  • Nyx PDF Classifier clean score 0.1542

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/~3/4aHNpQc2m6I/square?utm_term=rubbed+the+wrong+way
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec814e59713006cbe12b6c/1626112334368/80676214492.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f12a1e4be5f74a98e0c081/1626417694957/the_t_junction.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_off0000ec01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC01 16792 bytes
font_01_sfnt_off00010413.bin
2cd1c38c2439bde0d60fc38a3cfe997f330c7b013789ab73eb7da2d2128fa111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10413 22872 bytes
font_02_sfnt_off00013bfe.bin
06e774d6bcc0b2390da90706c839d54775968fe6d608307e8a06994276fc7d97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFE 10708 bytes

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