Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e4db8c9e3a2473…

MALICIOUS

PDF

75.2 KB Created: 2021-07-16 02:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29e4d953a72abf1a7896b4cda6ca2ba9 SHA-1: b03ac8bbf3ba026e093010864d7e494c02993b56 SHA-256: 55e4db8c9e3a247303e1dd74cf8c66d5b92aa3b7399595edb02298150edac897
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains an embedded URI pointing to a URL that appears to be a lure for a phishing or scam operation. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7395

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/gOBB6uaVNRA/square?utm_term=oxtail+soup+malaysia
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee81511cf0e6777f3255bb/1626243410031/nuneliwerewejavif.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f01217ec49181e3c121084/1626346007679/wiwedelakobi.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f05d810b1da83e50955de2/1626365314206/that_jumble_word_game_answers.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_off0000c423.bin
a93acdfe61dfa2fe5e9432ff710e661e592c2853ff7546556b50f2eb4928b2f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC423 10420 bytes
font_01_sfnt_off0000dbda.bin
22f1bf8119cb03a57b9e2e546c269d8f2898879928fa174bfc816817685da4ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDA 16748 bytes
font_02_sfnt_off000107a7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A7 16792 bytes

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