Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9737adb755f0a3b…

MALICIOUS

PDF

36.1 KB Created: 2021-07-06 11:37:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6aeff986cdc32e4cf67ba6049b8abb4e SHA-1: fe28ce4f653beb32999ec9717ab271ab0cf2c774 SHA-256: a9737adb755f0a3b2910a15a548fbdaa97e29eb41e2e5323e6de7e096fa866e2
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-bedrock-edition-pc-free-game-hack PDF link annotation
    • http://pustaka.bbppketindan.info/repository/free-robux-generator-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-lumber-tycoon-2-dll-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-coins-in-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/wurst-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-steves-one-piece-hack-gui_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-hack-someones-minecraft-account_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/coin-master-hacks-android_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/hacks-for-roblox-no-human-vertifcation_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/kachifpro_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/roblox-dont-sign-up-for-free_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-knives-on-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/admin-hack-roblox-dowload_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/rewardrobux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-robux-not-fake-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.bbppketindan.info//repository/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.bbppketindan.info/repository/free-acounts-in-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_off00003753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3753 22536 bytes
SHA-256: 38a9f0b4aeb28f35e6cb4c68c30d75ab15c0f475be6cd3b969a5ea1294ae26c1
font_01_sfnt_off00006967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6967 18712 bytes
SHA-256: fd9b8b130383843a433d26d2da76e24e17b9b33ae910cb53f97401bca5a2067b

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