Malicious PDF — malware analysis report

Static analysis result for SHA-256 7760e4f6245d28d9…

MALICIOUS

PDF

72.9 KB Created: 2021-07-20 08:40:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88c7efaa61a318602633cc8592cf15e7 SHA-1: 44628682c6a0db7684fe6dc7a8f0d56295f2ac8d SHA-256: 7760e4f6245d28d937a1f91b799dc27d7de23311dddc4a0f1b3d5d3afd240428
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The ClamAV heuristic identified this PDF as a phishing trojan, suggesting a malicious intent to deceive users. The presence of embedded URLs, although many are marked as benign, indicates a potential vector for further malicious activity or redirection. The file's structure also shows duplicate object bodies, which can sometimes be used to obfuscate malicious content within PDFs.

Machine Learning

  • Nyx PDF Classifier clean score 0.1869

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/kVSxLQpkboc/square?utm_term=muscles+that+control+eye+movement
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f040f21a40e718905596d9/1626358002789/two_faced_hypocrite.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2b83c81f38b20587f8dfa/1626519612566/11884217834.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_off0000be4e.bin
bfd35505caf60870a58647954cd3494dfb134c3d773338ed35f9c1fc25fcf805		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE4E 10676 bytes
font_01_sfnt_off0000d6b7.bin
64f720685d4cf17cb9403d09fafa67590deaf941bd8bb0211ed572c8011ac203		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B7 16036 bytes
font_02_sfnt_off0000ffd5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD5 16792 bytes

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