Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd85ab160894d98d…

MALICIOUS

PDF

76.4 KB Created: 2021-07-13 12:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 168b04755741f2fdd2df46c21e5f3e29 SHA-1: 02bbe66a863227436f6e8d44258a6279c1a7bd15 SHA-256: fd85ab160894d98da8e8b211483c95043325225013d9e63a1a32ceb6dfde7717
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URI pointing to an external website, identified as a phishing attempt by ClamAV. The URL 'https://inwebjor.ru/square?utm_term=downton+abbey+highlands' is the primary indicator of malicious intent, likely serving as a lure for users to visit a potentially harmful site. No scripts were extracted, but the presence of the malicious URL and the ClamAV detection strongly suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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://inwebjor.ru/square?utm_term=downton+abbey+highlands
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed2e1d3b21860fe66e504c/1626156573375/all_in_one_science_class_10.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8ee07b10b9b33fa95674f/1625878023970/sage_tailed_beast_mode.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_off0000cc59.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC59 16792 bytes
font_01_sfnt_off0000e470.bin
ef098fef8474ca82929d74be9e8e04de734f9deca4bbc46b5ccb6a39b2319426		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE470 10768 bytes
font_02_sfnt_off0000fd00.bin
59473b73bc458350e030d8eaf06dd61265dedeaf85c73759799411fc9cc7edfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD00 15996 bytes

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