Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0de418cba087f9d…

MALICIOUS

PDF

99.2 KB Created: 2021-07-15 18:33:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f707688c26c1df095d13a755dcf620c SHA-1: e1f1e5f0f629946aadb05572af935509571f5959 SHA-256: f0de418cba087f9d7c786ddeced6425689dff88a8a649ac8e02eaddf6e3f727d
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. The document contains embedded URLs that likely lead to malicious sites, attempting to trick users into visiting them. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3328

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/eaN1Eb74jJI/square?utm_term=ratio+and+proportion+three+quantities
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ed66a0f77a3e4a90f41456/1626171040755/class_9_english_the_lost_child_question_answer.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8d48d644c9b4de7f2fb52/1625871501423/xugoxeziwulo.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec7b1e4a8bde38c343c7ad/1626110750681/use_ira_to_buy_house.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107ca.bin
dba695954b6ae0099fcab4e83d6b5637a11833b77de3a2c1af18b4725bfc1c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107CA 19236 bytes
font_01_sfnt_off00013a91.bin
a671b3f17366e6dc06a9d7a9d8bb4cd6e29224812bccbc4b2fe024249ea4d79c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13A91 10736 bytes
font_02_sfnt_off000152f3.bin
309973d93049fd442947802560172466956b0acefca68a7b3d7869ed04227443		 pdf-font-stream PDF embedded font (sfnt) at offset 0x152F3 16140 bytes
font_03_sfnt_off0001685a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1685A 16792 bytes

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