Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe92f4107efb21a5…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 08:54:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c04174e46f11996a2bf4b1a555b5f82b SHA-1: 07fa94931a59f01166f946a1aa355a6fa33d6a3f SHA-256: fe92f4107efb21a53f51492728e75c3a65e12e1d951b1d00cb19135d09159f19
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising free game-related items like Robux and Coin Master cheats. The primary malicious URL identified is https://netcdn.online/app/431946152/free-roblox-accounts-with-robux-that-work-not-banned-game-hack. This lure is designed to trick users into clicking through to potentially harmful sites. No scripts were extracted, but the embedded URLs and the nature of the lure strongly indicate a phishing or scamming attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/free-roblox-accounts-with-robux-that-work-not-banned-game-hack In PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-coins-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/114-hacks_GM479516143.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/pubg-uc-price-in-pakistan_GM1330123889.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://vetmed.fkh.unair.ac.id/repository/how-to-hack-any-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.vetmed.fkh.unair.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052ae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AE 25456 bytes
SHA-256: cde57a7fa0f133bb6b449b4b90c2d0088c5413742c843fa204a94396fd9773b4
font_01_sfnt_off00008cde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDE 2872 bytes
SHA-256: 471b34484c3bee8d5bebbf3396bad215506385dbde547a2422db70e8efc075b4
font_02_sfnt_off00009699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9699 19248 bytes
SHA-256: efa3c9b2c8f55d2ce8a78f8ae751aa117ac14b1934403b15023fd1527a527783

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