Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d79a9b0e7bb132…

MALICIOUS

PDF

35.3 KB Created: 2021-07-03 11:50:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f322af9072c333ea3d5066b24f19e8d1 SHA-1: c0b71a9717096dee670810952cce0246fc123eee SHA-256: b3d79a9b0e7bb132b497239253aacf7bfbdfeb68f5bb3ea774066f77ed938d75
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link to a 'coin-master-daily-gift-free-spins-and-coins-link-game-hack' URL, which is flagged as a game hack redirector lure. The document body, though partially corrupted, also contains this URL and other similar links related to game hacks and generators. This suggests the primary purpose is to trick users into visiting a potentially malicious site. No scripts were extracted from this sample.

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/406889139/coin-master-daily-gift-free-spins-and-coins-link-game-hack PDF link annotation
    • https://lib.unitri.ac.id/repository/free-robux-go-to-guuudd-info_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-get-free-robux-youtube_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-get-free-spins-on-coin-master-2021-links_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-hacker-outfit_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-spins-gratis_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/unsopported-smoke-flight-roblox-free-copy_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-gert-free-robux-no-human-verificaion_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-hack-999999-robux-pc-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-noclip-hack-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/roblox-robux-hack-script_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-can-you-get-free-robuxs_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
stream_002_off000030e2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E2 23268 bytes
SHA-256: 48776223e3a7bad626cf5e4b2db123e6beea6a9efa7a3d83511a90787d175504
font_01_sfnt_off00006572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6572 18940 bytes
SHA-256: a6c8f3ff8a0dea06235968dd24959468b5e0dd7d526557991a378f144c82e936

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