Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd739f1cc22972ba…

MALICIOUS

PDF

35.1 KB Created: 2021-07-01 22:20:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-18
MD5: 7efd6188020a49a43e02252bbecf6678 SHA-1: ebd2634ef38e9412549df661f353610693db35e4 SHA-256: cd739f1cc22972ba880c0ced78647fd32c58eeef8f45f92a51e6b4bf2a6714b9
220 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-games-free-play-online-game-hack In PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/game-give-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-robux-watch-videos_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-robux-hack-no-robot-verification_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/rthe-wild-west-roblox-when-is-going-to-be-free_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-alcatela5_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/how-to-noclip-in-roblox-mac-without-cheat-engine_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/how-to-obtain-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/rbx-points-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/vehicle-tycoon-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/roblox-hacking-youtube_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-robux-no-scam-on-a-computer_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-spin-link-hack_GM406889139.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/hack-roblox-hack-free_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/how-to-get-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/robux-codes-generator-no-human-verification_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_off000030f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F2 22508 bytes
SHA-256: 7185c0aeb8aa11b7f27a11d09680bc61bdd4efa21837bf0a5bb01b15a4501eae
font_01_sfnt_off00006348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6348 19364 bytes
SHA-256: 1832fee060a447a8934fdfdfa759f757e75e639fc42cce70833bdae8db2e01ec

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