Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ddf42042eb1c2c3…

MALICIOUS

PDF

75.8 KB Created: 2021-07-20 08:15:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 077fd0e145ebaa8182bf8c3d416b5b79 SHA-1: d71f5fe1c11f1036b44bc3d68f738d58066d236b SHA-256: 5ddf42042eb1c2c388fe216ec6a03944896d0a72e8a691ad9ce44439b60d89db
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to malicious content. The wkhtmltopdf authoring application and the malformed document body indicate potential obfuscation or manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aauXj3bnHUA/square?utm_term=adult+teacup+chihuahua
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f44f1370ff22042a0e4cb5/1626623763260/construction_snag_list_format_in_excel.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec812f12c1416d2f1a99c4/1626112303607/79896935970.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f16455c825a553dff78949/1626432598039/rawafigeduvanasu.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f331bc22602c08caee6cdc/1626550716324/film_panther_full_movie.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_off0000cac0.bin
110d0e59c1fabe0142ee4cf3e9744ebe1979851c2926101e056eee4a566968e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC0 16188 bytes
font_01_sfnt_off0000f490.bin
504248ba00bce17a7651d627d56f181851436c7e38fd9047d605a42bb4f1924a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF490 10200 bytes
font_02_sfnt_off00010b8e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B8E 16792 bytes

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