Malicious PDF — malware analysis report

Static analysis result for SHA-256 685cff449684cb23…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 19:51:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3b4284e4e8f0cde132fab9e1a664f7e9 SHA-1: cae3b766e569473fbf43e040963e1d0c161762b3 SHA-256: 685cff449684cb23104c8b6641a036f14ed26e92aacd1a2f59ce1befefc210d2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/479516143/minecraft-windows-10-hacks-game-hack PDF link annotation
    • https://slims.bakrie.ac.id/textbook/repository/roblox-robot-animation-pack-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/https-oprewards-com-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/free-run-4-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-sprinting-simulator-hack-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-when-will-world-zero-release-for-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-robux-easy-2021-without-human-verification_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-how-to-get-a-free-name-change_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/friendly-face-free-robloxpgn_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/legit-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/doge-hat-roblox-free_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/coin-master-apk-hack-32_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-apocalypse-rising-dll-hack-downlaod_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/freegames911com-coinmastertipsandcheats2021freecoinsandspins_GM406889139.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/roblox-hack-tokyo-ghoul_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/how-to-get-free-models-in-roblox_GM431946152.pdfIn PDF document text
    • https://slims.bakrie.ac.id/textbook/repository/race-7-mejor-hack-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3439 22544 bytes
SHA-256: d474c08969a0b4758217ed50463df668dd20954aed81297584ce0d9579874ca7
font_01_sfnt_off000065f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F1 18980 bytes
SHA-256: d5302a4262de0fe7b8485f3acdacc44f64fa6fcaf4d5e81661a82341b69d1a02

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