Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3f51d96a11b429c…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 13:02:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 91d6b3cc19ffed6cb0da9ad8d5870378 SHA-1: 122ecd12145287a5212a2a55a8384cbf4a615ecb SHA-256: b3f51d96a11b429c89ee48fbb81cc874de6f39f8d4601db327a68bc695a19fa2
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/431946152/how-to-get-free-robux-youtube-game-hack PDF link annotation
    • https://opac.itp.ac.id/repository/no-offer-robux-hack_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-speed-hack-code-5-1-19_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-master-fan-page-facebook_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-fedora-free_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/win-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/slurp-hack-roblox-counter-blox_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-hole-in-the-wall-cheat_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-on-a-ipad_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/free-spin-and-coin-blogspot_GM406889139.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-hack-levels-on-roblox-paintball_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/https-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/roblox-hack-build-tools_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/how-to-get-free-robux-glitch-2021-august_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/https-rbx-place-rewards_GM431946152.pdfIn PDF document text
    • https://opac.itp.ac.id/repository/coin-blogspot_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_off00002e6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6F 22136 bytes
SHA-256: 3943801de9b6e3f08b2e76232cbbd2209e16c9e2eef250429556cf79b0ad3288
font_01_sfnt_off00005f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 19144 bytes
SHA-256: 69f15bf39f48ef2819c4fe30de5c54b763846b00a79d58176de4c37c6d2b833d

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