Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1322fcb0b8a80d…

MALICIOUS

PDF

72.1 KB Created: 2021-07-14 00:01:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7846ff863eb77d735a6a1417d21aa55 SHA-1: a89a6b9ea7cf8b1332a919e940a479e2cf0d7872 SHA-256: 5a1322fcb0b8a80ddeb26b04c1cef0ec2b7e557a4d61462d7e87fda28014350d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. The embedded URL points to a suspicious domain, likely intended for phishing. No scripts were extracted, but the PDF structure and heuristics indicate malicious intent, possibly involving a JavaScript exploit to redirect the user.

Machine Learning

  • Nyx PDF Classifier clean score 0.1829

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://archism.ru/square?utm_term=how+to+find+the+marginal+distribution
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec9222f83a7f26ecd1bf20/1626116642243/bachelor_of_engineering_in_tamil.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_off0000bb8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB8A 16792 bytes
font_01_sfnt_off0000d3a1.bin
f65cf1ec348edb97db9b17454c94eb926606d59fe1217d6819a57bd0b3cf2501		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A1 11120 bytes
font_02_sfnt_off0000ed24.bin
9e96b97a6a93b5c2d6d707e84b419180d8f516d6117099f8c213943618b4d657		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 15572 bytes

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