Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6e252a943bbb630…

MALICIOUS

PDF

46.2 KB Created: 2021-06-11 01:54:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6b6eafaf5061dc4e2f0a976fc108972d SHA-1: 9633c8b6014a0fcf8c4afbbee16daf16c6b73782 SHA-256: b6e252a943bbb630f92af4702cbfc1a2b09358c532c4c073d2b27f098172eedd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to potentially malicious content, specifically related to game hacks and free generators. The heuristic firings indicate that the document links to known malicious redirector infrastructure. While no scripts were explicitly extracted, the nature of the embedded URLs and the lure suggest an attempt to trick the user into visiting malicious sites, likely for further exploitation or malware delivery.

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/how-to-exploit-your-on-roblox-with-cheat-engine-game-hack In PDF document text
    • https://linhkien247.vn/public/upload/files/best-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/buy-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/how-do-you-get-robux-for-free-on-phone_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/free-minecraft-com_GM479516143.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/robux-hack-no-survey-2021_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/cheats-for-city-arcatect-roblox_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • https://linhkien247.vn/public/upload/files/how-to-hack-coin-master-apple_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
font_00_sfnt_off00005067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5067 27256 bytes
SHA-256: 391fb6e7ce77a2f2f1dd43dbb57abe71951c548c30d1f1f0e3a88aad8b840ce6
font_01_sfnt_off00008e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4A 19532 bytes
SHA-256: b75587c970fd40927b90e02c95a523837c796aa8f33535c25ffc19ba8fa2a228