Malicious PDF — malware analysis report

Static analysis result for SHA-256 a801e89a08dc7074…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 07:30:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e83030f5a9a86905792a1d9801d734f3 SHA-1: 6a9152b5c22a3eb18f88b960701c5075aab80d3e SHA-256: a801e89a08dc7074fcc093fbc5b86e2a1cb9cad2a3037dca2becfa1fed07bb78
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a malicious redirector, leading to a lure for free game hacks or generators. The primary malicious link is http://netcdn.tw/app/835599320/how-to-download-tiktok-free-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector pattern, likely intended to lead the user to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/835599320/how-to-download-tiktok-free-game-hack In PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/survival-games-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/seiten-zum-robux-hacken_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/is-roblox-downloadable-on-ps4-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/injector-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-windows-10-edition-unlock-full-game-free_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/jailbreak-roblox-money-hacks_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-script-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-other-pples-stuff-on-roblox-mm2_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-codes-october-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-admin-hack-script_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hack-mod-menu-download_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-hacks-download-free-dll_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-script-pastebin-instent-in-promo-code-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-elemental-battlegrounds-hack-diamonds_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_off000035b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35B6 21680 bytes
SHA-256: dac1932c6a1b052a8ec7b0bc31e63a084ddca77ff9c95d464c10320d076163c8
font_01_sfnt_off00006583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6583 18552 bytes
SHA-256: a39ed53c648607e2ee9ef14032c86e4c642a95a4d4776154cbd24c515fa50068

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