Malicious PDF — malware analysis report

Static analysis result for SHA-256 c796dfb8d7d4d06c…

MALICIOUS

PDF

76.8 KB Created: 2021-07-14 08:25:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 676f06e90428972c80e82ee78eef2fe7 SHA-1: 586ef8ddbcf2d7317517938f9b8118df797b6dfd SHA-256: c796dfb8d7d4d06c62d8257b3d92a9ddea95153ebea1f634af0b6a5d6f4220ff
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The embedded URL points to a Squarespace domain, which is often used to host phishing pages. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site for credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9680

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/AG-UZpNbJGc/square?utm_term=car+contract+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee3a48eed6cd77ab61cfe1/1626225224441/74047511520.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8bc640c1002185596f374/1625865316939/meaning_of_the_word_obligatory.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee4a71e7148d06bc71d03f/1626229362023/300mm_x_200mm_in_inches.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7c751adf2c26882ffabe7/1625802577481/nazomopovolozewolafupafes.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93f7d3f195e1e403748d8/1625898877250/32214069702.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8c7e4c3dba77ad335b1d0/1625868260668/first_and_second_cervical_vertebrae.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7d25381ab8d1aa9deae35/1625805396155/229658076.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ede7331f6a95122870b3ba/1626203955431/itchy_smelly_vag.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_off0000cf92.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF92 16792 bytes
font_01_sfnt_off0000e7a9.bin
cc6dd1ca10e7556e6478845db3dd9958574d01e0ba9fcd38989f87d53b8d33c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A9 10208 bytes
font_02_sfnt_off0000feaa.bin
e6ab9c784e1d6fa5f9578c12af825183fd005e7e7271b52c1e36e7010d058c77		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAA 15816 bytes

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