Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9bc377bd8644f31…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 05:57:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a625e26c78333c2a5252770b69281605 SHA-1: 777cd72093c639e8b7eb0695d51e790c08be9cdc SHA-256: f9bc377bd8644f31dabcd22ade79d52542eb765a30c192eea8bdbd3368bfce55
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/roblox-bloxburg-hack-game-hack PDF link annotation
    • http://www.sovtigaz.ru/f/files/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/moon-tycoon-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-uber-roblox-sound-id_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/roblox-slaying-simulator-hack-script_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-develop-a-noclip-hack-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/robux-hacks-tay-take-off-newest_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-download-roblox-for-windows-10_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/all-game-pass-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/free-robux-now_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/coin-master-free-chest-link_GM406889139.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-be-a-hacker-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://www.sovtigaz.ru/f/files/how-to-hack-roblox-website_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_off00002e7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E7E 22200 bytes
SHA-256: 199e014069fcb0698a6908c4561911acb73a44937c9daf7eb0419ab72bf0dac8
font_01_sfnt_off00005fe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE4 18796 bytes
SHA-256: f6c6cfc8a4c74313b99c280e337f52933cf16367538b4e099c104341d6f73406