Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4a9efc46517e270…

MALICIOUS

PDF

34.0 KB Created: 2021-07-04 17:42:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 99e317b7cd75b22678c589a28c5d415d SHA-1: f8b89cf92e3d94e3176a9d8d4ec87e73d9be0c4a SHA-256: f4a9efc46517e2702ae897c97b88f85a618d8d653c825c76d28a9b6313323515
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents itself as a lure for free Robux and game hacks, indicated by the document body and numerous embedded URLs. The presence of a 'Password-protected archive handoff' heuristic suggests the document may be designed to deliver a password-protected payload, likely downloaded from one of the provided URLs. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-no-offers-game-hack
    • http://library.poltekkes-palangkaraya.ac.id//repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/easy-coin-master-hack_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/2021-april-fools-hack-roblox_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/easy-how-to-get-free-robux_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-hack-org_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/roblox-free-hair-girl_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-change-the-script-on-roblox-2021-free-robux_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/www-roblox-cheats-for-robux_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id//repository/minecraft-115-2-hacks_GM479516143.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-for-all-roblox_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/roblox-wall-design-hack_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/natural-disaster-survival-roblox-cheats_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-get-free-items-in-roblox-camping-game_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/script-executor-free-download-roblox_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-buy-pubg-uc-in-india_GM1330123889.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-card-hack-2021_GM406889139.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-can-i-get-every-item-on-roblox-for-free_GM431946152.pdf
    • http://library.poltekkes-palangkaraya.ac.id/repository/vido-for-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000300e.bin
78dc78c6a7787c95707df1b8b600106978e7edd9679575f1b767183566122dcf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x300E 22060 bytes
font_01_sfnt_off000060ed.bin
6cef72b87605a464df8901898d024a902d738decefc8e487a7362df6534fb924		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60ED 18716 bytes

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