Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f2e6aea8819150…

MALICIOUS

PDF

33.4 KB Created: 2021-07-19 13:33:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 516c2b64ba496492b70c5b6444504329 SHA-1: d2bc1aadd74c0d9adb8e60008243a822e7c21e05 SHA-256: 92f2e6aea8819150ee174d0421086351aaac38e8179a2688583069c73ff7801f
160 Risk Score

Malware Insights

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

This PDF document employs a lure of free game currency and hacks to entice users into clicking a malicious link. The primary link, http://netcdn.tw/app/431946152/free-promo-codes-for-robux-game-hack, is identified as a known malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a potential for exploitation or redirection to a malicious site, likely involving client-side execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/431946152/free-promo-codes-for-robux-game-hack In PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.gulfautotools.com/uploaded_files/userfiles/files/free-spin-coin-master-2021-link_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_off00002cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBB 22516 bytes
SHA-256: 752397e50c6c80fe93895eb30a92aff7d36c7cab5358cf8be0b15d234e464480
font_01_sfnt_off00005ef7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF7 18788 bytes
SHA-256: ab75ffe9be872e4c1bc2197683357fdf07206899b5fb4b8ac8af9ce0fbddbc1b