Malicious PDF — malware analysis report

Static analysis result for SHA-256 5808a5a7021ab4e8…

MALICIOUS

PDF

47.1 KB Created: 2021-06-09 08:25:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b0a0db5a0cd3e8d4d54a5592ba06406b SHA-1: 5170058e4590cbd528277c4ebb6d70cf25786a50 SHA-256: 5808a5a7021ab4e8e00495882cd8db19300d6b869373225f2bb364d299a9a24d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document displays a fake CAPTCHA to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL points to a resource related to game cheats, further supporting the lure. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to lead the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 4

  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 https://netcdn.tw/app/431946152/how-to-get-free-wings-in-roblox-promo-codes-game-hack
    • https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-build-a-boat-cheats_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/dino-sim-roblox-apk-to-albino-terror-for-free_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-classic-free_GM479516143.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/hacks-para-roblox-gratis_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-get-free-items-in-roblox-camping-game_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-speedhack-roblox-without-cheat-engine_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-java-free_GM479516143.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/dragon-ball-x-roblox-hack_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/injector-hack-for-roblox_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/cheats-in-pet-rnch-roblox_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-roblox-exploits-website_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-tiktok-views-no-verification_GM835599320.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-jojo-blox-hack-script_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/minecraft-name-tag-hacks_GM479516143.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-cheats-com_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/free-group-funds-roblox_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/how-to-hack-meep-city-roblox-money-2021_GM431946152.pdf
    • https://ths-academy.net/wp-content/uploads/fsqm-files/roblox-free-robux-offers_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000056b5.bin
2157db8e5a3905359c4606c195e209ddce4fda4d56dc7c73a2a668bf33e1578b
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x56B5 25616 bytes
font_01_sfnt_off0000924c.bin
aeebd49e39de89bc9f993d1ce4b0d6d2ffe7c0895b886ef0675a93706ebd3f15
pdf-font-stream PDF embedded font (sfnt) at offset 0x924C 19408 bytes