Malicious PDF — malware analysis report

Static analysis result for SHA-256 2866ec1991734192…

MALICIOUS

PDF

32.8 KB Created: 2021-07-06 15:30:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: adbf51423d6262f66b260e0a101be3d8 SHA-1: 1728c874723803b88ae553cf8ba8cd5b0352a210 SHA-256: 2866ec1991734192a5ec78a0380c0beaa7cbf220cb1b9c4ae9126e31e7c92d5b
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 0.9824

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/431946152/ow-to-get-free-robux-no-scam-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/roblox-prison-life-cheat-engine-hack_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-generator_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/dfield-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-for-android_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-do-you-hack-free-robux-2021-on-pc_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hacks-and-cheats-for-robux_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-free-download-chromebook_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-game-hunter_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/jailbreak-roblox-free-money-generator_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-online-link_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-coin-master-online-without-human-verification_GM406889139.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_off000029ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29EA 22360 bytes
SHA-256: 120a47a57e214c9961567b02507d80ef05cb4cca8b18eb2489fdb84c57fe402b
font_01_sfnt_off00005b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7C 19060 bytes
SHA-256: 647e93fe6dd10276e52e62bf160801211f3e0ea12919d5414dfad1771a4a2da6

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