Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1cd74debb447b9…

MALICIOUS

PDF

45.2 KB Created: 2021-06-09 15:20:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 45c9d6e7fa404682111d792664a4bbc0 SHA-1: bf84b8022e1880eff6d2d1b2225eba268f7a0027 SHA-256: 7f1cd74debb447b9e20c6af424d4f90419c9e04c99487fe083452a0323814ae1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, specifically advertising 'game hacks' and 'free generators' for popular games like Roblox and Coin Master. The primary link, https://netcdn.tw/app/431946152/roblox-is-going-to-be-hacked-march-18th-game-hack, is flagged as a lure for game hacks. The document body, though heavily corrupted, contains similar text and URLs, reinforcing the phishing attempt. No scripts were extracted, but the embedded links are the primary vector for malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/roblox-is-going-to-be-hacked-march-18th-game-hack In PDF document text
    • http://safari-crimea.com/images/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/unlimited-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-get-free-roblox-hair_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/free-robux-clan_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-hack-app-ios-download_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-daily-free-spins-link_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-bonus_GM406889139.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_off00005102.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5102 25204 bytes
SHA-256: b9fbf7791074a7dc63b77cd30bb9db677faab3b4095b4e71ec0930a18ad303be
font_01_sfnt_off00008a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A52 19548 bytes
SHA-256: 7a56694a6799c9c145a38d2e17a4769147e0be8ddf46cfb6e6537bdb680a5d8a