Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b11886d3035785d…

MALICIOUS

PDF

82.8 KB Created: 2021-07-13 16:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00a1b3ea597307fd6cd4ee4ea46ebab7 SHA-1: 9b585075738503dc51de346ab448c2c3df12cd8a SHA-256: 5b11886d3035785da7c10651f7a766ba3b1120e4cf2bdcb4035a203e897c759f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, although many are marked as benign, suggests an attempt to redirect the user to potentially harmful external content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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/S-4CHg4Qmwo/square?utm_term=meaning+for+testimony
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecb2a9ed332b23a5bc807e/1626124969987/bring_back_bring_back_my_bonnie_to_me.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ecd12b8cc5f05e71dae442/1626132779308/67594871099.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7d26dafd06e4982ea0d9b/1625805422051/angry_birds_go_download_apk.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_off0000e004.bin
14c0d9784d013e652012a411fee2d394ae5fbdd0ac0cff2a288f771218ae913c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE004 10616 bytes
font_01_sfnt_off0000f850.bin
8c5a743c511af6f8b386262c30d4fd992d19d765c6e89493fe29a49abd987593		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 17460 bytes
font_02_sfnt_off000125fc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125FC 16792 bytes

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