Malicious PDF — malware analysis report

Static analysis result for SHA-256 8db933b1c58d33c6…

MALICIOUS

PDF

74.7 KB Created: 2021-07-19 17:33:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54ac74c80cc90f980c88d7811ef1bc18 SHA-1: 264eccf341560736d5649aa667ee2dd52d8a5962 SHA-256: 8db933b1c58d33c6e0d7b628baf1f84557b20b158a989dd3eefbce60d89e79ce
66 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. It contains embedded URLs, one of which points to a domain commonly associated with phishing lures. Although the document body is heavily obfuscated and unreadable, the presence of these indicators suggests an attempt to trick the user into visiting a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier clean score 0.1822

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/razvivatel/yapz/~3/nCRFBnYrBHY/square?utm_term=is+wmv+smaller+than+mp4
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e867254576b64e43b2618d/1625843493595/acre_feet_to_million_gallons.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_off0000c328.bin
499a586639bd650c084941b27680215c3b784d5021c571d64be2889239adab85		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC328 17412 bytes
font_01_sfnt_off0000edf7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF7 16792 bytes
font_02_sfnt_off0001060e.bin
f73b1b127bd8ad61e3a455c2de7a04ad607875fb7addd4f0f7caf33be5b52cee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1060E 10488 bytes

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