Malicious PDF — malware analysis report

Static analysis result for SHA-256 81e85db84969add3…

MALICIOUS

PDF

34.6 KB Created: 2021-06-30 04:39:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 608807b0e4b611db6fd2577768e59d67 SHA-1: 7935d9a83bad725ddcc9fdf918c8ba557049f6de SHA-256: 81e85db84969add3d557583acb1dffa7af2a93815145a2b1b57478b3f15f1b97
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to redirectors and lures, specifically targeting users interested in game hacks and free in-game currency for popular games like Roblox. The heuristic firings indicate that these links lead to known malicious infrastructure and are designed as a download button lure. While no scripts were extracted, the embedded URLs and the nature of the lures suggest the document is intended to lead the user to download and execute a malicious payload.

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/blackberry-hacks-roblox-game-hack In PDF document text
    • http://library.ft.upnvj.ac.id/repository/blockzone-site-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-white-pants-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/wings-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-robux-hack-generator-no-app-download_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-roblox-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-robux-by-playing-meep-city_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-dance-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/www-roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-clothes-for-free-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/how-to-get-free-robux-easy-download_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/multigame-aimbot-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/minecraft-free-download-2021_GM479516143.pdfIn PDF document text
    • http://library.ft.upnvj.ac.id/repository/minecraft-pocket-edition-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ed0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED0 23052 bytes
SHA-256: 6c92824f6dbe4fe37be893d39fd56297416cc778901b89fc3c033a1f7c9bb359
font_01_sfnt_off000062b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B7 18836 bytes
SHA-256: 000355adc762a6c5603598f23b2ac61589e6c6ec818abac9561076e4588f8a0f

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