Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2ea5624ecf7c2f…

MALICIOUS

PDF

43.3 KB Created: 2021-05-19 08:05:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 135bf3c46898071608947b9921a2a20f SHA-1: e19a09627fedbbb9352707a7ca4f5d1a43441ff0 SHA-256: fb2ea5624ecf7c2f683ee01b9db983fdc0a01048b4337236b8acb4527d121a10
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The sample was flagged by an ML classifier as malicious and contains heuristics indicating a fake CAPTCHA or human verification prompt, designed to trick users. The document body and embedded URLs suggest a lure for downloading potentially malicious software, such as game hacks or cheats. No scripts were extracted, but the presence of external URIs and the fake CAPTCHA strongly suggest an attempt to facilitate the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/479516143/minecraft-pocket-edition-download-free-pe-calculator-game-hack
    • http://feuerwehr-rheinau.de/images/pubg-uc-generator-without-verification_GM1330123889.pdf
    • http://feuerwehr-rheinau.de/images/javascript-free-robux_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/hack-coin-master-spin-apk_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/ways-to-get-robux_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/is-there-a-free-version-of-minecraft_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/what-is-wurst_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/minecraft-bedrock-for-free_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/coin-master-free-coins-and-spins-daily-summary_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/hacking-apps-for-roblox_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/rewardrobux-com_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/minecraft-logo-maker-free_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/coin-master-daily-free-spins_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/roblox-help-free-robux_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/minecraft-free-download-iphone_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/rblx-city-free-robux_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/coin-master-free-spins-link-hack_GM406889139.pdf
    • http://feuerwehr-rheinau.de/images/impact-minecraft-hack_GM479516143.pdf
    • http://feuerwehr-rheinau.de/images/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/tower-of-hell-roblox-hack_GM431946152.pdf
    • http://feuerwehr-rheinau.de/images/hack-coin-master-online-without-human-verification_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d2a.bin
a7711afcf16eedacb2378068edda00c1089e9c98d8a79c491423a15e69451b1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2A 24520 bytes
font_01_sfnt_off000085a0.bin
8668002c62b81273482b61da1613b994afc8b764b14ec7b2ef260aeb97363f7c
pdf-font-stream PDF embedded font (sfnt) at offset 0x85A0 18752 bytes