Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e44e7ef850ee80…

MALICIOUS

PDF

46.5 KB Created: 2021-06-10 23:35:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 6644e9c232db1eb95ff34d0c400374f4 SHA-1: cbbedc928ce70a6961aa2e07ca32bf46942c5847 SHA-256: 84e44e7ef850ee80fa84da9f3080b8e79bde122c7a1397ae8064ac2ed383fa6f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9832

Heuristics 5

  • 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.
  • 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/unjailbreak-hack-roblox-2021-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/roblox-hack-script-pastebin-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-exploit-mega-nz-free-emperor-roblox-hack-mega-nz_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/cheat-codes-pegboard-nerds-roblox-music_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/generator-get-free-robux-denisdaily_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pokemon-go-free-yanma_GM1094591345.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/avatar-roblox-free-skin_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/flip-master-coins-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-make-a-pretty-roblox-girl-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
stream_004_off000050f8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50F8 27816 bytes
SHA-256: 204c1889dd5aff802d24a1ead5cd390f26f439cffcce94dc3c1479dcdb2e42df
font_01_sfnt_off000090d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90D7 19080 bytes
SHA-256: 00e34c7d4bf5ab9ac085c4e806f68d8cbf7505d828cf92ee646530a7288b99ff

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