Malicious PDF — malware analysis report

Static analysis result for SHA-256 447e4f02c9dad161…

MALICIOUS

PDF

72.1 KB Created: 2021-07-12 21:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 776ab2e82458a521d5c190714adeb3dd SHA-1: cb2f4452d5a8d85ab4fef9036754ec75e5b6ec7f SHA-256: 447e4f02c9dad1618d5ae3344cab6773859a61bba75902f1795c35e97817bce9
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 that points to a URL, likely intended to trick the user into downloading a payload. The PDF structure and embedded artifacts do not suggest a specific malware family, hence it is classified as unknown.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6583

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/gPkW7oTCsL0/square?utm_term=mellen+gi+remix+in+the+end+mp3+download
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8f392566ded7d61aaf513/1625879442935/19616238786.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e9657b37cb90447561f6b6/1625908603901/the_last_lecture_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec78c667baa26076baabf7/1626110150475/strength_of_materials_notes_for_diploma_civil_engineering.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_off0000b873.bin
11aa4441fe62373bceba45dcc6d56ca92a300a4a002d156220e0cbb5c1db3102		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB873 11024 bytes
font_01_sfnt_off0000d1b2.bin
cab4b6db25129c6955b7bb90db1b7f91ae3ea69f3b70c2d97b7a6c19b97fb758		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD1B2 16472 bytes
font_02_sfnt_off0000fc4f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4F 16792 bytes

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