Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f430f472a0c5f1c…

MALICIOUS

PDF

38.0 KB Created: 2021-05-19 00:32:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 94b8e743219c6c7b177f26e2f6442a1c SHA-1: d7e20bc7dc8d6d275ded3ad440e2c2401c7b16d4 SHA-256: 8f430f472a0c5f1c2dfc7ed7664c96d74ce8e408299dc2459d65318527262cab
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a malicious link disguised as a 'free generator / game hack' for Roblox. This link redirects to a page that displays a fake CAPTCHA or human verification prompt, likely to trick the user into executing further malicious actions or downloading additional payloads. The document body and heuristics strongly indicate a social engineering lure for malicious redirection.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/how-to-hack-roblox-for-robux-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_off000035df.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35DF 25696 bytes
SHA-256: be69eae91ac2086261706eca943abd5b084c3fd4365ead355c476e81c66beb15
font_01_sfnt_off00007207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7207 18648 bytes
SHA-256: 7689b6731d47fc176aef925fc5194a10a34d162e90d7014a3ccea13949bcaf7e

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