Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fdd64c639364faf…

MALICIOUS

PDF

37.0 KB Created: 2021-05-16 13:02:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f4e6d7f0dd2268d7f450132877eab210 SHA-1: 7fdbcd4afc6e262fdf2369c56034dd751fb81436 SHA-256: 7fdd64c639364faf330e51ce502296e20fd7c462eec097bfeff72e3af48638f5
130 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically advertising a 'Free Robux Hack'. The document body also contains similar lures and a call-to-action phrase, indicating a social engineering attempt to trick the user into visiting a malicious site. The presence of PDF-specific heuristics for malicious redirects and game hack lures strongly suggests this is a phishing or scam document.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

Heuristics 4

  • 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.
  • 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-hack-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_off000034f4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34F4 25032 bytes
SHA-256: 9b4bff1714d745391cfad22f3ad2879eec6904f94262902dc03ce233cac7c7f5
font_01_sfnt_off00006f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F0B 18412 bytes
SHA-256: 8090616d8a5c0701bec53dfbbcc7430816d9db69864bd7c9067c717eb12c26b4

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