Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c21403e9af5699…

MALICIOUS

PDF

105.1 KB Created: 2022-07-08 22:38:50 Authoring application: Gunk Battery Terminal Cleaner Msds acquired (via FPDF 1.82) First seen: 2022-07-15
MD5: 855058e43411d5788319115e3c826120 SHA-1: 65e5b8a40b6a3b58721ceb17e263c23e3a45258b SHA-256: 68c21403e9af5699804da6c162f554442547e71bc348acf7d077838494c22875
84 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains heuristics indicating it lures the user into executing commands via the clipboard, a common tactic for initial execution. It also suggests the user will need to handle password-protected archives, implying a multi-stage attack. The embedded URLs likely serve as download locations for subsequent payloads.

Machine Learning

  • Nyx PDF Classifier clean score 0.0007

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://unraidjournals.site/Gunk-Battery-Terminal-Cleaner-Msds/pdf/www.taylorandforgie.com.au
    • http://unraidjournals.site/Gunk-Battery-Terminal-Cleaner-Msds/doc/www.taylorandforgie.com.au
    • https://www.taylorandforgie.com.au/wp-content/uploads/formidable/4/student-activities-manual-answers-spanish.pdf
    • https://www.taylorandforgie.com.au/wp-content/uploads/formidable/4/bill-of-complaint-for-annulment.pdf
    • https://www.taylorandforgie.com.au/wp-content/uploads/formidable/4/performance-evaluation-of-services-over-cloud.pdf
    • https://www.taylorandforgie.com.au/wp-content/uploads/formidable/4/hud-fair-housing-planning-guide.pdf
    • https://www.taylorandforgie.com.au/wp-content/uploads/formidable/4/california-meal-waiver-law.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_015_off0001992e.bin
43b13684882d332187dbe2691d5e4f64c33a98e381a4dc2316374ba1b923b47c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1992E 76950 bytes

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