Malicious PDF — malware analysis report

Static analysis result for SHA-256 017d291f376ef1da…

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 22:51:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5f5d63f039c125f4c46cd16887f32845 SHA-1: 6c18a5e93ccda0f9b1d46746746b348ab37dd38d SHA-256: 017d291f376ef1da907d2a40e2289adaf9e0ffc22251477d13cbbf019a0c0a88
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a call-to-action to trick the user into downloading a file from a provided URL. The ML classifier strongly indicated maliciousness, and the embedded URLs suggest a lure for game-related cheats or hacks. No scripts were extracted, but the overall pattern points to a downloader or exploit delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/how-to-get-free-headphones-on-roblox-2021-game-hack PDF link annotation
    • https://vierabyragazze.com/upload/files/money-cheats-for-rocitizens-in-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hack-download-deutsch_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-clicker-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-scar-h-free-in-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/www-roblox-hack-com_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/win-free-robux_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-cheat-engine-hacks-october-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/get-free-robux-202120212021202120212021202120212021000-b_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-minecraft-servers-to-join_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-rare-cards_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/cheats-in-roblox-prison-life_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_off000030a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30A5 22108 bytes
SHA-256: 0f1e0fe011447630e77ab701411873bb0ad0633680700b95ba629b50e2c6f66d
font_01_sfnt_off000061c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C6 19836 bytes
SHA-256: 79a322dd46f0c013667b1332ee60e4ed862292b09b4915fbe660ba03738c6c51

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