Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cee39c6ebfc87d3…

MALICIOUS

PDF

45.7 KB Created: 2021-06-13 17:36:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d376b711de7e0754cba4b7399cc01203 SHA-1: a9b8527380e0d955c2953a5d42e5b28df5d0ca74 SHA-256: 9cee39c6ebfc87d3db19170f565935df644b027974cc49f5790e851d5ae3e135
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically promoting game hacks and generators. The primary lure URL, http://netcdn.co/app/431946152/roblox-hacks-slurp-game-hack, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to game hacks and the wkhtmltopdf application, suggesting a lure-based attack. No scripts were extracted, but the presence of malicious links and the ML classifier's high confidence indicate a high likelihood of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 http://netcdn.co/app/431946152/roblox-hacks-slurp-game-hack In PDF document text
    • http://library.itekes-bali.ac.id/repository/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-assasin-hack-script-2021-unpacthed_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-unlimited-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/rbx-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-things-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-hack-app-ios_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-18_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
stream_004_off000052c2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52C2 26032 bytes
SHA-256: 887b3d459af2c3d3ebcd12347eb0a533473179a963ae39ec96bbe2d217b20518
font_01_sfnt_off00008f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F54 18500 bytes
SHA-256: 5e8ef48ed8c36d30ea3c8ec5435d1ae1a581cf0fbcebad23d1cd69a40bb0532a

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