Malicious PDF — malware analysis report

Static analysis result for SHA-256 229c12faa32a0afd…

MALICIOUS

PDF

39.9 KB Created: 2021-05-24 07:07:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 31ad7426f2d92df1e09639d7b9a5ea2a SHA-1: 5024e3d295a632410899ceccf1dd7514360a71f6 SHA-256: 229c12faa32a0afdf2689154a650120c4402d94b5816ba618379b5cf4b9ebd56
82 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and a prominent call-to-action to obtain free Robux, directing users to a malicious URL. The document body and embedded heuristics indicate a social engineering attempt to trick users into visiting a potentially harmful website. No scripts were extracted, but the presence of external URIs and the fake CAPTCHA heuristic strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

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/free-robux-no-verification-no-download-game-hack PDF link annotation
    • http://rollipolli.hu/userfiles/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/how-do-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031ce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31CE 24936 bytes
SHA-256: 921d78babb6811773215b4e33bbd5182d7f2bed985f3e65a51cc3a2fd999c892
font_01_sfnt_off00006abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABD 3928 bytes
SHA-256: 8621c8d502ef3782778d9f8a6275bb869c86817d512651ca4fd19fb1e249c467
font_02_sfnt_off000077a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A1 19180 bytes
SHA-256: 529ad809d39cb86513f1fd0a7c59ac13158e8644a31ce1f1c8620f9d5ad40971

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