Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f754d5186fbc3c…

MALICIOUS

PDF

33.7 KB Created: 2020-05-30 17:11:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ab47cd61dabc40719b92c7d7b34a148 SHA-1: a2b45f9033c08526988757c68d3b12f0f5c7eff4 SHA-256: 12f754d5186fbc3c1dcdd6b592d2f5effd4e6cf2f53372467197c0ab67d4386c
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple embedded URLs and triggers a heuristic for clipboard command execution lures. The document instructs the user to copy and paste content into a shell, which is a common technique to bypass security measures and execute malicious commands. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9862

Heuristics 4

  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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 http://thedogbedcompany.net/uploads/1/3/1/3/131382346/131382346.html#winsxs+temp+pendingrenames
    • http://wbhsmusicboosters.com/uploads/1/3/0/6/130639689/zivadobolerajowurez.pdf
    • http://projecthomestead.us/uploads/1/3/0/8/130873843/3dc8518a7f9.pdf
    • http://miscellaneous-music.com/uploads/1/3/0/5/130589374/dae58ae1e5b6942.pdf
    • http://cherrygamenews.com/uploads/1/3/1/6/131606273/zituxotinuzef-fiwelafa-gazaturozupu-wijofawubul.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000056f7.bin
f3aa8e2f5f508cb0ea40efc83401f3ed5c01f96ca0d72c3a0fa04b2a0f3c467b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56F7 11260 bytes

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