Malicious PDF — malware analysis report

Static analysis result for SHA-256 20c2253a07d9087d…

MALICIOUS

PDF

37.7 KB Created: 2021-05-21 13:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8aa2be3ca08676fe9b6e539b89351e42 SHA-1: eeb48d6dc08aed271264dd0071438475fa823a07 SHA-256: 20c2253a07d9087db470a1b01269fcda72da1d83aa098bed1492b3a9f4a7f353
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a call-to-action phrase, suggesting a lure for downloading potentially malicious content. The heuristic for a password-protected archive handoff indicates that the user is likely instructed to download an archive, which is then expected to be password-protected to bypass security measures. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 4

  • 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-get-minecraft-for-free-on-phone-game-hack
    • http://subarulegacy.com/images/coin-master-free-spins-hack-no-human-verification_GM406889139.pdf
    • http://subarulegacy.com/images/coin-master-spin-hack-no-verification_GM406889139.pdf
    • http://subarulegacy.com/images/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdf
    • http://subarulegacy.com/images/www-free-robux-com_GM431946152.pdf
    • http://subarulegacy.com/images/robux-free-robux_GM431946152.pdf
    • https://playhack.in/minecraft
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000036e8.bin
8cdef3e690b317ecaba5792badb8b1b1fd73145f3d872022f7d038b774aa4e88		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x36E8 25988 bytes
font_01_sfnt_off00007294.bin
90b6a34edb34d309cd556a6b23817db9766b775643cedc81c4ce7203f03c64d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7294 18192 bytes

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