Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8f180d56f7c4f72…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 05:28:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0f1ec3ab9bbb3f78c4c4869afeee58d3 SHA-1: 02e4f3000d2eed5bb5b51123bb7e4da9d3ded73f SHA-256: e8f180d56f7c4f7204a2ddb6569ab63e898eb58d6eb5dc704f0cfa04fdc7a74a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a redirector lure, specifically linking to a 'free generator / game hack'. The embedded URL, http://netcdn.tw/app/406889139/coinmaster-links-game-hack, is identified as malicious redirector infrastructure. The document body also contains this URL, reinforcing the lure. While no scripts were extracted, the primary attack pattern involves redirecting the user to potentially malicious content, likely as an initial step in a larger attack chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coinmaster-links-game-hack In PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/5-roblox-edit-this-cookie-hacks_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/rbx-sites_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-promo-codes-roblox-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-as-a-kid_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/airplane-2-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/istalar-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-change-your-roblox-username-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/is-pokemon-go-community-day-free_GM1094591345.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/hack-roblox-pin-cod_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/coin-master-2021_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_off00003155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3155 22612 bytes
SHA-256: 9250dd2937e638d6e166dd92c6b66909b213cd0118885331d691302f17817b9b
font_01_sfnt_off000063ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63CE 18264 bytes
SHA-256: cd2d4d9d379a8916250aac1c40b30da442fa59c9e5313384739df103290c40c0

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