Malicious PDF — malware analysis report

Static analysis result for SHA-256 f597429556902c4f…

MALICIOUS

PDF

36.6 KB Created: 2021-05-23 08:49:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1570222f071b37d5b402c1f6a4303517 SHA-1: 9c8af7c05df42234d3c53378fb4b9dae33698fd9 SHA-256: f597429556902c4fd88cd9c0f2857d67a020af2957fd334705c671815feec3f2
122 Risk Score

Malware Insights

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

The PDF document employs a fake CAPTCHA and download button lure, presenting itself as a 'free Robux generator' to trick users. It contains multiple embedded URLs pointing to sites offering game hacks and generators, which are likely malicious redirects or download sites. The ML classifier also flagged this PDF as malicious, indicating a high probability of a malicious payload or exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9447

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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/how-to-get-free-robux-easy-2021-game-hack PDF link annotation
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/free-tiktok-fans-hack_GM835599320.pdfIn PDF document text
    • http://elearning.mimcabangpurbalingga.com/__statics/gudangsoal/files/how-to-get-free-robux-without-paying_GM431946152.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_002_off00003357.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3357 24516 bytes
SHA-256: e4cb1cf82b8aa5e046c4eba4882d3fb849413f0c5922a196f02a74a09d960846
font_01_sfnt_off00006b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B2D 19092 bytes
SHA-256: b4f5bd8c8985fe06cb8cafea7c6a35db41ab3230d9b691422e9309a9df735677

Open this report in the interactive analyzer, or submit your own file for analysis.