Malicious PDF — malware analysis report

Static analysis result for SHA-256 78e0cdda6fcda0e6…

MALICIOUS

PDF

76.2 KB Created: 2021-07-14 05:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bc47eb35754e1d79600b8f66f26050cd SHA-1: 670fcb11bda4b8efe8ec300bd59822bd14545c09 SHA-256: 78e0cdda6fcda0e69082f8141817d2d15bcdf31f4a6e877de8fae20414ace63d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URI pointing to a URL, which is a common tactic for phishing or directing users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/AnJPYMJXbyQ/square?utm_term=the+crucible+act+2+quotes
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e9383de51f1f218d6ac4b8/1625897022086/36766406425.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7693de055dd31fd067685/1625778493855/dos_batch_file_variables.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8e8d9cb57f380a786879/1626115725519/natural_wonders_of_the_world.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e9654637cb90447561f2a4/1625908550322/personal_exemption_worksheet.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec86645f604029b991d3ae/1626113637095/21368466251.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee06447ce58f02ed97df8b/1626211908793/swords_and_sandals_2_redux_hacked.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7990ee8ef4d41b4f6e8ea/1625790734755/the_first_epistle_of_clement.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_off0000c83f.bin
e61ea9adba7d31be605091e248547deb080139e483bf858c2e5cc11ab74b083f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC83F 10692 bytes
font_01_sfnt_off0000e0f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F9 16792 bytes
font_02_sfnt_off0000f90b.bin
036d6f1a2283cb49a8a4c06dbda56da17d87cc3fe4899d194d101c498e19d3d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 16900 bytes

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