Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f86c9eb485e614…

MALICIOUS

PDF

34.4 KB Created: 2021-06-28 20:51:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-07-01
MD5: c00994e1fe1a24b280130ed0fd533c44 SHA-1: 42f9faf33d414cd2e4b7fe9d56c0f726f3349921 SHA-256: a4f86c9eb485e6140e8fe0da779cebf59860906caaa441ee4bc9acccf63c0916
160 Risk Score

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/hack-cheats-for-roblox-game-hack In PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-com-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/gamekit-how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/anti-ban-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-to-get-free-robux-100-works_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/robloxcom-free-avatar_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/free-robux-2021-may_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/hack-jailbreak-roblox-police_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-hacker-2021-download-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/my-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/can-cheat-engine-get-you-banned-from-roblox_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/roblox-veil-free_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmkklawang.com/opac/repository/how-to-cheat-in-iphone-7-roblox-piano-tiles-2_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn extracted file (font_00_sfnt_off0000307e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000307e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x307E 22104 bytes
SHA-256: e9c9d0903a187c19c023d020995905c53c3814b5ba801b7066c09f25bb080b3d
font_01_sfnt_off0000618b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618B 19088 bytes
SHA-256: d37b0b2c33cba8e91da3341b270fb05bc5f33c67639bebd20fa0875d5e9510c6