Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b6bf99845769b3a…

MALICIOUS

PDF

35.9 KB Created: 2021-07-05 03:46:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9bf1f3ac7ce6b8d538be35482194aed2 SHA-1: caa747c2e8f55e79a0d215c7451fb269a2984f79 SHA-256: 3b6bf99845769b3ab9eb63c5e06cdfb37112bf43d7c03dc7d6465ece2ac4892d
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/hacks-for-roblox-phantom-forces-2021-game-hack PDF link annotation
    • http://lib.untad.ac.id/repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-dec-219_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-taser-script-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/nazi-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-hackprogamers-com_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/noob-invasion-roblox-get-free-kills_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/generator-robux-free-2021-sans-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-spin-and-trading-group_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-download-android-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-de-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-fly-hack-lua-download_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-welcome-to-bloxburg-money-hack-lua_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-exe-download-free_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_off00003175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3175 23144 bytes
SHA-256: ecc91416d623a5d8dbaada4198113f0f2c81ed5c010e8759fb7247ac99901152
font_01_sfnt_off00006596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6596 19720 bytes
SHA-256: 4b33091761fc4436e0758cfdeeb38ec9787cf514fccf09eb4763700715295cd3

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