Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfc99ea662cd0c6e…

MALICIOUS

PDF

37.9 KB Created: 2021-05-13 06:30:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: eb709912a0bad127a87ef3c7fa06c2b9 SHA-1: 7da16b1ee8b768410fb8ef729087a21dff5665bc SHA-256: bfc99ea662cd0c6e818e3ba2a232bea2043b8293cad7fe89f4a671209ced9486
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a link that redirects to a website offering a 'game hack' for free Robux, a common lure for phishing or malware distribution. The heuristic firings confirm this is a malicious redirector link. While no scripts were extracted, the document's structure and embedded URL strongly suggest an attempt to trick users into visiting a malicious site, likely for further payload delivery or credential harvesting.

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/how-to-hack-roblox-to-get-free-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_off000034b2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34B2 26920 bytes
SHA-256: 515ce7cd5998f5e724c074e32404938a9defce2bcf7c6f4ae8f34ad819776ea1
font_01_sfnt_off0000716c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716C 18756 bytes
SHA-256: a768fd9037f2962d7d468f6b0310abba3890de72b41426d235b5de2790bab1ac

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