Malicious PDF — malware analysis report

Static analysis result for SHA-256 11bd5d2df8c6d4e6…

MALICIOUS

PDF

43.8 KB Created: 2021-06-03 16:14:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 123ee8f2e0848978bf80301f94458c08 SHA-1: f6e4c98ca42ce723508f695862afb5fb41672aea SHA-256: 11bd5d2df8c6d4e6c61cecd425ffa941c9dfef188f937f512421491098673c97
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector, specifically promoting 'free generator / game hack' lures. The document body, though heavily obfuscated, contains text and URLs consistent with these lures. The primary malicious action observed is directing the user to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/431946152/how-do-you-get-free-robux-game-hack In PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-cheat-to-get-free-spins_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-generator-hack_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-hack-tool-v1-9-pc_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-robux-master_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/www-robux-com_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/what-is-wurst_GM479516143.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-hack-apk-download_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/coin-master-hack-tool-download_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/free-codes-for-assassin-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/android-coin-master-3433-apk-hack_GM406889139.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/robux-free-c_GM431946152.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/pubg-uc-rate_GM1330123889.pdfIn PDF document text
    • https://www.andrology.co.uk/uploads/files/files/pokemon-go-free-remote-raid-pass_GM1094591345.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_off00004dda.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DDA 24852 bytes
SHA-256: 881f936ee4350443c100b40181feeb76f743ebe6319ba92eb79779d507bbb24c
font_01_sfnt_off00008789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8789 18612 bytes
SHA-256: 37b0398febc23a1417b5642eaebf6c5e0b941c8fdaeae9a9e3ba89062b3e12f9