Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c198ccf413b6af7…

MALICIOUS

PDF

39.4 KB Created: 2021-05-17 21:34:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1cbfab46172dac05caf85f1a52e910fd SHA-1: 521966cb2608638643e63a47cd3847b35ea667b3 SHA-256: 3c198ccf413b6af7f25d3befc6ba393adacfa92d31ea967c1d7ff458b99be5f5
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains links that redirect to known malicious infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure appears to be related to Coin Master and Roblox, aiming to trick users into visiting potentially harmful sites. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 3

  • 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.
  • 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.xyz/app/406889139/coin-master-daily-spins-and-coins-game-hack In PDF document text
    • http://fobh.net/userfiles/files/free-roblox-toy-codes-not-used_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-latest-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/robux-redeem_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-win-10-free_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-coins-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://fobh.net/userfiles/files/minecraft-pe-017-0-apk-free-download-android_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/free-coin-master-account_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://fobh.net/userfiles/files/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://fobh.net/userfiles/files/how-to-get-free-robux-with-no-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
stream_003_off0000486c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486C 25440 bytes
SHA-256: 035f090e3b7b466f79981326cd753e704ce772f3d61efb274c2668132aa3a37b
font_01_sfnt_off00008336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8336 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676

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