Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc01fb39601e5081…

MALICIOUS

PDF

44.2 KB Created: 2021-05-22 06:34:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a505913ca1fc9c98b9039c50e15e87ff SHA-1: 71b5df2a38496b1887640e3079d2bc50a76b39cc SHA-256: fc01fb39601e5081b40e20ab2bf6630f8658306d99919de6727f507e621d2962
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links and a call-to-action button designed to trick users into visiting malicious websites, masquerading as free generators or game hacks. The primary malicious URL identified is https://netcdn.xyz/app/431946152/free-robux-survey-game-hack, which is part of a chain of redirectors. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7481

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-survey-game-hack In PDF document text
    • https://omhelsjehart.nu/images/mistplay-robux_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/free-spin-link_GM406889139.pdfIn PDF document text
    • https://omhelsjehart.nu/images/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://omhelsjehart.nu/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003621.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3621 25720 bytes
SHA-256: e7bd16301ae042096577e0ca75ed5f9b5f71ae299bfe2d9d58b5ee3901ed910f
font_01_sfnt_off00007252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7252 7660 bytes
SHA-256: a92ce5c2b1c17f52144ea7bab21df5c4af63c4c4fcf1aeb3d0e4c774ce998811
font_02_sfnt_off00008b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B96 18308 bytes
SHA-256: 74a940f1217583ab80956cd168fb81f959241543e2b3413e790743682303989f

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