Malicious PDF — malware analysis report

Static analysis result for SHA-256 80de80e19121a9cb…

MALICIOUS

PDF

34.3 KB Created: 2021-07-01 08:40:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 89bcd2707c0299ba8b1ce06c7fabceb6 SHA-1: 8d43b6c82548496441cb4551f24f3ed9ff51b5dd SHA-256: 80de80e19121a9cba341959b3b4fcbfea3f7eeecbce430f5f745f53ab7c77fe0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs and a call-to-action phrase, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs advertise free in-game currency and items, a common lure for users to download potentially harmful files.

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.co/app/431946152/create-your-own-avatar-free-roblox-game-hack In PDF document text
    • http://centr-expert.su/images/get-robux-paid-access-games-free_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/free-robux-generator-no-download-2021_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-com-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/cheats-for-lumber-tycoon-2-on-roblox_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/free-spin-coin-master-apk_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-buy-robux-for-free_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/hack-roblox-pour-des-roblux_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/how-to-hack-mad-games-roblox_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-play-for-free-online-no-download_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/do-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/roblox-deadzone-hack_GM431946152.pdfIn PDF document text
    • http://centr-expert.su/images/free-spins-coin-master-october-17-2021_GM406889139.pdfIn PDF document text
    • http://centr-expert.su/images/coin-master-server-hack_GM406889139.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_off00002e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E8F 22268 bytes
SHA-256: 5ef24bbacee6563291398d7b86d34eb088e4f532d21e9ba18783f8c93ee0db94
font_01_sfnt_off00006023.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 19332 bytes
SHA-256: 525bb975edf627f2a08fe09fbbfcacbb741ecb57481d91fb2db1d8c3cc64bec8

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