Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ead2aa03c6eb53…

MALICIOUS

PDF

35.4 KB Created: 2021-05-21 14:39:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6f71471b9a796753d3e11a0941d12a32 SHA-1: afbabbeec9c465b2bfa180a2c2a22676be64f9b2 SHA-256: 91ead2aa03c6eb538e1677605a5f9333a94fee353a33f41dbf20e17576e70a18
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a call-to-action button, aiming to trick users into clicking malicious links. The embedded URL and other extracted URLs point to websites offering game hacks and cheats, which are common lures for phishing and malware distribution. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/431946152/roblox-free-items-glitch-game-hack
    • http://killebergsridsport.se/images/minecraft-bedrock-hacks_GM479516143.pdf
    • http://killebergsridsport.se/images/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://killebergsridsport.se/images/coin-master-free-fire_GM406889139.pdf
    • http://killebergsridsport.se/images/how-to-play-coin-master_GM406889139.pdf
    • http://killebergsridsport.se/images/clean-master-coins-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003014.bin
7cd9177bc3a400016067cad6aa79d37789ae8a7c675409b0281a10ed439da957		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3014 24364 bytes
font_01_sfnt_off00006825.bin
4757519c7671ab5617e6eca55c97a41b239b6d75f6392fe64a9742a0da978b36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6825 18596 bytes

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