Malicious PDF — malware analysis report

Static analysis result for SHA-256 372bb2c47e2cf576…

MALICIOUS

PDF

46.5 KB Created: 2021-06-08 11:55:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c8e5137f3523ea25b1002be9a13892d1 SHA-1: ac3e37b20e4ac8fdb0af1cd0f6ffac4f1fe9e1af SHA-256: 372bb2c47e2cf576a2eeefebc4df3e809080eec55cd0fc180b3c40f2cf179c73
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a malicious URL. Multiple other URLs associated with similar lures were also extracted. The document body, though heavily obfuscated, contains references to game hacks and a URL, reinforcing the lure. The presence of embedded URLs and the nature of the lure suggest an attempt to trick users into downloading or accessing further malicious content, likely through a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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/invisible-blue-hack-roblox-game-hack In PDF document text
    • http://bgnails.nl/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-fun-free-spins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/toolbox-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-daily-spin-link-app_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-hack-on-roblox-adopt-me_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-generator-2021-android_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/ccv3-roblox-cheats_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_004_off0000504e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x504E 29628 bytes
SHA-256: d1473592d662c77011816142fbdbf7e7870f511a67cd68d2186d2e13d98363fc
font_01_sfnt_off00009291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9291 18556 bytes
SHA-256: 414bbeacad500877aec7480ca6fa5e8a7d5866220a0802356a843713384469f1

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