Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf8b3e7537d918f5…

MALICIOUS

PDF

34.8 KB Created: 2021-06-27 06:46:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7dc06a6c0fecea49bda0c926b453c7a7 SHA-1: bd83301441d90554dfb9fd3927268d252fd331f9 SHA-256: cf8b3e7537d918f58570f7e57e610f36287eae3775dea9444bd7bafbe23fc0a5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to a known malicious redirector infrastructure, specifically advertising game hacks for popular titles like Roblox and Minecraft. The document body and heuristic firings confirm the lure is for 'free generators' and 'game hacks'. The primary IOC is the malicious redirector URL which is likely used to serve a second-stage payload or phish for credentials.

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/demogorgon-roblox-free-body-game-hack In PDF document text
    • https://www.ocic.hr/files/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/pubg-uc-earn_GM1330123889.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-cheat-client_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/how-to-sell-a-free-model-on-roblox-studio_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/get-free-roblox-clothes-2021_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/ww-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/is-roblox-free-on-xbox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-daily-free-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-anime-girl-patrol-tsundere-red-demo-script-hack_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_off00002e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E6E 22852 bytes
SHA-256: 9df58b968f6b8d8ff9a0e2541997a59ba0ff8f73d99dcbe99d1cd36c163cbce5
font_01_sfnt_off000061bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61BF 19432 bytes
SHA-256: 2cfa2be65092a6871d94c26d13cf12f8bcae35ab7bd031f31653f4d15b9e9fd8