Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc934e73364dab56…

MALICIOUS

PDF

34.2 KB Created: 2021-06-26 03:17:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e94b04154cbdb05c20dd4aa20a37d93f SHA-1: 59a2df65beb6d6bf8c914c5a0b8aa36016c4b70b SHA-256: dc934e73364dab56d0e5f620095b4419e4be209920275d396ec5a2267a388d32
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a fake CAPTCHA lure, designed to trick users into interacting with malicious links. It also exhibits characteristics of a link farm, with numerous embedded URLs pointing to potentially malicious content related to game hacks and free currency. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a harmful payload or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/hack-para-jailbreak-roblox-2021-game-hack
    • https://schneider-und-berger.de/images/free-robux-gift-card-codes-2021_GM431946152.pdf
    • https://schneider-und-berger.de/images/free-robux-hack-on-desktop_GM431946152.pdf
    • https://schneider-und-berger.de/images/free-robux-no-survey_GM431946152.pdf
    • https://schneider-und-berger.de/images/roblox-cheats-for-name-that-character_GM431946152.pdf
    • https://schneider-und-berger.de/images/get-free-robux-no-human-verification_GM431946152.pdf
    • https://schneider-und-berger.de/images/get-free-robux-2021-no-survey_GM431946152.pdf
    • https://schneider-und-berger.de/images/how-can-you-get-free-robux_GM431946152.pdf
    • https://schneider-und-berger.de/images/how-to-get-free-followers-on-roblox_GM431946152.pdf
    • https://schneider-und-berger.de/images/roblox-robloxs-mod-rmod-r-mod-hack_GM431946152.pdf
    • https://schneider-und-berger.de/images/robux-download_GM431946152.pdf
    • https://schneider-und-berger.de/images/hack-point-parkour-roblox_GM431946152.pdf
    • https://schneider-und-berger.de/images/how-to-get-free-spins-on-coin-master-iphone_GM406889139.pdf
    • https://schneider-und-berger.de/images/free-spin-coin-master-2021_GM406889139.pdf
    • https://schneider-und-berger.de/images/how-to-get-free-robux-instantly-2021_GM431946152.pdf
    • https://schneider-und-berger.de/images/free-spin-link-coin-master-today_GM406889139.pdf
    • https://schneider-und-berger.de/images/how-to-hack-in-roblox-apocalypse-rising-2021_GM431946152.pdf
    • https://schneider-und-berger.de/images/free-robux-no-offers_GM431946152.pdf
    • https://schneider-und-berger.de/images/avatar-the-last-airbender-roblox-hack_GM431946152.pdf
    • https://schneider-und-berger.de/images/minecraft-java-free-account_GM479516143.pdf
    • https://schneider-und-berger.de/images/roblox-the-scary-elevator-red-keys-locations-cheat-sheet_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000306a.bin
13968867c16239688814928846b6f62e9f1b1f6fe333bf844e39830efbd0d373
pdf-font-stream PDF embedded font (sfnt) at offset 0x306A 21468 bytes
font_01_sfnt_off00005efd.bin
e247479ec3da2dece33affd48658e7c1a9e7ccad727ac281b5597135392a2748
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFD 19500 bytes