Malicious PDF — malware analysis report

Static analysis result for SHA-256 1860f2082a0d775b…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 12:12:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 48337b7edbd0c5a96277f0765a1ee3ba SHA-1: f60f02f4aeb393dbaf0864495d2c6b22e758d412 SHA-256: 1860f2082a0d775ba5a368f33ef055ec255403e87d719d07014aa24be058e108
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free generators' and 'game hacks'. The primary redirect URL is http://netcdn.tw/app/406889139/daily-coin-master-free-spin-apk-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to lead users to potentially malicious content or downloads.

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/daily-coin-master-free-spin-apk-game-hack In PDF document text
    • https://www.toyogas.com.tw/upload/files/xbox-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/roblox-martial-arts-battle-arena-kai-hack_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/cheat-roblox-mad-city-pour-etre-riche_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/free-lua-roblox-exploit_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/legit-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/roblox-hack-tool-download-2021_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/toolbox-for-minecraft-ios_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/como-tener-hacks-en-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/coin-master-hack-spin_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/how-to-get-free-robux-on-tablet-easy_GM431946152.pdfIn PDF document text
    • https://www.toyogas.com.tw/upload/files/www-coin-master_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_002_off00003159.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3159 23292 bytes
SHA-256: 9d8fb486f21836942e35ccb61a5c9ddceafc331429c632e12736b975a26b65ab
font_01_sfnt_off00006631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6631 18768 bytes
SHA-256: 20f7b44e526c10bc2e4fef9df4a675fd93804089751163aff3315ba8e0bc37cc