Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff4aa50593294a0a…

MALICIOUS

PDF

42.7 KB Created: 2021-05-18 01:50:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 23badb06eb7b420b69851d56d52054ff SHA-1: abc34b2f8804a54dd74611c9e06b192906198ab5 SHA-256: ff4aa50593294a0afc45d815abcdf3b4d779baa9902a898e534a20c1563ab015
82 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA to trick the user into clicking a link, which is a common social engineering tactic. The embedded URL and numerous other URLs point to sites offering game-related hacks, suggesting a lure for potentially malicious downloads or further exploitation. No scripts were extracted, but the presence of a fake CAPTCHA and external links strongly indicates a malicious intent to redirect the user to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/2021-free-spins-on-coin-master-game-hack PDF link annotation
    • http://samfora.de/images/how-to-get-free-robux-on-iphone_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/earn-robux-online_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/free-robux-script_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://samfora.de/images/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://samfora.de/images/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://samfora.de/images/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://samfora.de/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/free-coin-master-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://samfora.de/images/minecraft-pe-017-0-apk-free-download-android_GM479516143.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_003_off000048aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48AA 25696 bytes
SHA-256: 1e3ec87911978f63100220d61f833dea45fb16712470bd99be7471acd7fd7ee7
font_01_sfnt_off00008480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8480 18288 bytes
SHA-256: 622f5559f42d42bdf895aa0dd0378bc93f6cb1528ecbdf5ac45ca29ab5b27cb4

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