Malicious PDF — malware analysis report

Static analysis result for SHA-256 36c2a0a08d55d162…

MALICIOUS

PDF

35.1 KB Created: 2021-06-29 10:54:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2b2c4697fddbf026361ade56d8217661 SHA-1: ab065ad030df64d8c66e87da2c50c0bf5205f7db SHA-256: 36c2a0a08d55d1624a76aea5f737e247915b886548bfedb4e572c358b55c8c64
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-severity heuristic firing for linking to a 'free generator / game hack' redirector, specifically http://netcdn.co/app/431946152/www-play-roblox-for-free-com-game-hack. This indicates the document's purpose is to trick users into visiting a malicious site, likely to download further malware or engage in credential harvesting. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/www-play-roblox-for-free-com-game-hack PDF link annotation
    • https://www.toyogas.com.tw/upload/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/minecraft-bedrock-free-with-java_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/free-roblox-stuff-blue-hood_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/como-hackear-a-un-amigo-en-roblox_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/roblox-free-radio-games_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/coin-master-hack-tool-2021_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/roblox-breaking-point-fullbright-hack_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/real-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/roblox-cheats-tablet_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/free-minecraft-java-edition-account_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/robux-hack-2021-pastebin_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/roblox-phantom-forces-cheats_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/how-to-make-clothes-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/free-coins-for-planet-master-game_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_off0000312b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312B 22264 bytes
SHA-256: e97df97fb76d753de38e1dc251a1a4276efcb465f746119a8ba037d5d916bbd9
font_01_sfnt_off0000629e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629E 19604 bytes
SHA-256: ff6c61e9435c22deb8c5559c59e236902db7b3ef506387e01a15f0198f0db8c6