Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7ad4f8369adb668…

MALICIOUS

PDF

76.2 KB Created: 2021-07-13 17:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14b7e171cf5324b856f43ded590f82d5 SHA-1: e54dee311018db7132c2d1fd4516a2166101ffad SHA-256: d7ad4f8369adb668d3fc8dccbeff512e9c4df3d7ba6429690d26910c11f745f4
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing attempt. The presence of embedded URLs suggests the document is intended to redirect users to external sites, likely for credential harvesting or further malware delivery. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7390

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/sq/ugae/~3/gPkW7oTCsL0/square?utm_term=structure+of+agree+disagree+essay
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7d944d93aeb546a145d5f/1625807172465/limits_piecewise_functions_graph.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec921e51a87c5d75ad0ad7/1626116638411/south_san_francisco_unified_school_district.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e779d9b19f4840add3cbf6/1625782745974/pinizon.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e8b46749b7892017cdb5c0/1625863271919/the_demand_for_movies_is_unit_elastic_if.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_off0000cb6e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6E 16792 bytes
font_01_sfnt_off0000e385.bin
e894f29c14622c732c55d8496ad17846189f427b9451da7364f18fbf9e6a4e6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE385 10792 bytes
font_02_sfnt_off0000fc56.bin
7a534de1f3112f6774dec828520b71cf223eccc9f1c73a4c448d5f4e20fc0b37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC56 15852 bytes

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