Malicious PDF — malware analysis report

Static analysis result for SHA-256 698a777215df1ee6…

MALICIOUS

PDF

75.8 KB Created: 2021-07-16 01:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9c6c2ba06c48eb2b3b97e047057c76a SHA-1: 8b040a55b8cb3907ca8fc120edd45fbee761895d SHA-256: 698a777215df1ee66142e6dd9eeebfa6fca93714ce4ff680ae66d9876c144ecb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains an embedded URL. The ClamAV detection and ML classifier indicate maliciousness, and the embedded URL suggests a phishing or social engineering attempt to trick the user into downloading a payload. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/razvivatel/yapz/~3/nCRFBnYrBHY/square?utm_term=rufus+software+download+for+pc+free+full+version
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f05f617c351464f95524bf/1626365793728/22618497296.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee735f84a0477e84ae844f/1626239839377/kimetaxoxuriwazowerumej.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ed8d21bde79631d340ea86/1626180897502/gameloop_cod_mobile_controller.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee6bce8feeeb055d9d0652/1626237902939/mergers_and_acquisitions_exam_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7b96d48fdc259403f0751/1625799021177/82838358115.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_off0000c6c5.bin
dd732185ec0209e820ffe7f191f6e612b5a34f5829b68be570d318cda5efca4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6C5 16480 bytes
font_01_sfnt_off0000f1ae.bin
17c641f62abc263cbc233b98891e53a27ba251f80ee5d61297bfae6f5a310a86		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 10908 bytes
font_02_sfnt_off00010b27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B27 16792 bytes

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