Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5718c530742f4ec…

MALICIOUS

PDF

36.1 KB Created: 2021-05-15 23:31:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9601537b4d56142a6e189f2bfb85c287 SHA-1: e896bdcafde1b385dc32bf021bb86a69ac1530f0 SHA-256: e5718c530742f4ec24c47c9c959f8bacbb8541b016806c054e3c717d510048eb
170 Risk Score

Malware Insights

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

The PDF document contains a lure for 'Free Robux' and 'game hacks', directing users to a known malicious redirector URL. The document body and heuristics indicate a fake CAPTCHA or human verification prompt is displayed to trick users into interacting with the malicious link. This suggests an attempt to deliver a second-stage payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0302

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-on-iphone-game-hack In 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_off00003298.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3298 24864 bytes
SHA-256: bc46864035b6ee4b153cbe2c2d185ce42938ee6daa6e6d5f50ddbcd441d8ad06
font_01_sfnt_off00006bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BBD 18356 bytes
SHA-256: 09002ce3ba94cfa5154e24d4605185e25e9b5ae3e76d565aeacf431b5bbbf1e5

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