Malicious PDF — malware analysis report

Static analysis result for SHA-256 611e2a56759b54dc…

MALICIOUS

PDF

38.4 KB Created: 2021-05-24 14:35:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6111c799686a4438312ef4180e36c349 SHA-1: 93147ceda9946d1a67eecf902b90cb91f27465a5 SHA-256: 611e2a56759b54dcb10b4b3cb68c75c6d8df4481abec28e53baec5f00e9f655c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF document contains a fake CAPTCHA lure to trick users into clicking a link for a "TikTok generator". The document body and heuristics indicate that the primary goal is to direct the user to a malicious URL. Several other PDF documents are also referenced, suggesting a potential campaign distributing similar lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7268

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/835599320/free-tiktok-fans-game-hack
    • http://www.bripi.pl/images/is-minecraft-dungeons-free_GM479516143.pdf
    • http://www.bripi.pl/images/websites-to-get-free-robux_GM431946152.pdf
    • http://www.bripi.pl/images/get-more-robux_GM431946152.pdf
    • http://www.bripi.pl/images/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdf
    • http://www.bripi.pl/images/roblox-free-robux-generator_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f05.bin
815f52030462887f1992afbe4e2eebdb698e91d2ae67095cb0b8d7bca70888b9		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F05 27136 bytes
font_01_sfnt_off00006c98.bin
0ff7203f6678b3ce5cadf82d8d4ab75daf80d11355a5b436446d16072593a6f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C98 2840 bytes
font_02_sfnt_off00007653.bin
9a08de3b0af5ab49577e5f4245d13b378d625872d2828bf675c34a9d6b9d0b04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7653 17684 bytes

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