Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b882e4d158736a…

MALICIOUS

PDF

36.8 KB Created: 2021-05-23 07:38:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 433a384dfda75f355644ba9193861119 SHA-1: 7f922ac52a0c90cb328b8f5f00dba18078f552cd SHA-256: 59b882e4d158736aed49a51861eadee5410d4119ac844c79d7808d9f88acca4b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains multiple embedded links and a primary URI pointing to domains associated with free in-game currency or server hosting lures. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to execute a command or click a link, bypassing macro restrictions. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests a common tactic to hide malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 5

  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://netcdn.xyz/app/479516143/how-to-start-a-minecraft-server-for-free-game-hack
    • http://iacfhouston.com/images/get-free-spins-coin-master_GM406889139.pdf
    • http://iacfhouston.com/images/free-robux-hack-no-verification_GM431946152.pdf
    • http://iacfhouston.com/images/earn-robux-websites_GM431946152.pdf
    • http://iacfhouston.com/images/free-robux-please_GM431946152.pdf
    • http://iacfhouston.com/images/getrobux-now_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003525.bin
f7607180274a8f75fda9a857a470ad6b7c3b930c3f4c2415657b122378d21a77		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3525 25628 bytes
font_01_sfnt_off00006f71.bin
4f50b9796c9c5e6e2841d90a47ce680cd3d0047611852497406c2f0c8cfa935a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F71 17988 bytes

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