Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd733a83c288530c…

MALICIOUS

PDF

46.3 KB Created: 2021-06-10 23:23:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2f2ab89e7e4f4595b4e079f772cbf6e4 SHA-1: 2b68fa77b6d0baa72a26f6d8ae608cb97288707d SHA-256: fd733a83c288530ccd7580ce2c70474f478d18738b99ef08275e0d369b8b7e86
82 Risk Score

Malware Insights

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

The PDF document contains a lure related to 'free Robux' and includes an embedded URL pointing to a suspicious domain. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly suggests this is an advance-fee fraud attempt. The ML classifier also flagged the PDF as malicious with high confidence. The primary IOC is the external URL used in the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.tw/app/431946152/claim-gg-free-robux-by-roblox-events-game-hack
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-spins-coin-master-2021-glitch_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hack-apk-33-download_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/how-to-get-free-pet-food-in-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/all-minecraft-handbooks_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id/repository/stock-speed-coin-master-free-spins_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/easy-roblox-today_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-a-free-minecraft-account_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id//repository/give-me-free-robux_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id//repository/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/free-spins-coin-master-no-survey_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/how-to-block-someone-on-coin-master_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdf
    • http://perpus.poltekeskupang.ac.id/repository/minecraft-thumbnail-maker-free_GM479516143.pdf
    • http://perpus.poltekeskupang.ac.id/repository/coin-master-blogspot-free-spins_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-hacks_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id//repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdf
    • http://perpus.poltekeskupang.ac.id/repository/robuxmatchcom-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000055be.bin
5b7c2be926ac0ff11fc2f25c19dc5b837957e731be14c59b759dabfc34ba44ab		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55BE 24904 bytes
font_01_sfnt_off00008f1a.bin
89f5e688dfa093063532d747c6f6e3ccd589556b1b2d6d2f636d4606ccd41307		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1A 19380 bytes

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