Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6ed08a6180323a…

MALICIOUS

PDF

43.2 KB Created: 2021-05-11 07:03:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 920abf6ca72b8cf207ee76cfe7a69c3d SHA-1: 366a9db140da9e9155e5874b456d21ae3ed46c9f SHA-256: 9d6ed08a6180323aee0d8f967be6dfd425b66af01ce55602c31ee9a7e3213683
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free generator / game hack' lures. The primary redirector URL is https://netcdn.xyz/app/431946152/roblox-army-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack, likely initiated via spearphishing attachment. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/roblox-army-free-robux-game-hack In PDF document text
    • http://bibliodetki.ru/images/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-minecraft-skins-girl_GM479516143.pdfIn PDF document text
    • http://bibliodetki.ru/images/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/roblox-hax_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/whats-robux_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://bibliodetki.ru/images/coin-master-online-hack-link_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/download-hack-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://bibliodetki.ru/images/minecraft-xbox-one-code-free_GM479516143.pdfIn PDF document text
    • http://bibliodetki.ru/images/free-robux-com-2021_GM431946152.pdfIn 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
font_00_sfnt_off000048a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48A1 26316 bytes
SHA-256: 5132e19b57a554ff2f43aebfb40b0441e6a20a6eddea2ee566c85b8ac39ca35e
font_01_sfnt_off000085f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85F1 18528 bytes
SHA-256: 3fb3182e9b0518fecce2d6326c4443e9fc052433b5a2fc23416796f92e2510b3

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