Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f83aa595cb645b…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 23:44:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5c34fc6964af07efd8967e05fb0ad2f8 SHA-1: 8fd9b8bd6ab4bb0d2d0a80e90c49dde78df4a970 SHA-256: 16f83aa595cb645b7cea699f4675d1fe507ba4ab92df10dd03b66bb793f02edd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, masquerading as game hacks and generators. The primary lure URL is http://netcdn.tw/app/479516143/minecraft-bedrock-edition-pc-free-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate a malicious redirector workflow designed to entice users to download potentially harmful content. The ML classifier strongly supports the malicious verdict.

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/479516143/minecraft-bedrock-edition-pc-free-game-hack In PDF document text
    • http://sttlets.education/senayan/repository/video-de-roblox-hack_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/hacks-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-get-free-stuff-from-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/is-it-possible-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-g_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/can-i-make-roblox-items-free-2021_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/get-gold-coin-master-village-hack_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-robux-free-codes-android-s9_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan//repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/free-roblox-dress-up_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/robux-robux_GM431946152.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://sttlets.education/senayan/repository/roblox-cheat-codes-shift_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
font_00_sfnt_off000031ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31EC 22488 bytes
SHA-256: 7fd852278e0e240eac437207a60a927a5e2af8863e9be5f009c0f718aa119013
font_01_sfnt_off00006418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 18712 bytes
SHA-256: fd9b8b130383843a433d26d2da76e24e17b9b33ae910cb53f97401bca5a2067b

Open this report in the interactive analyzer, or submit your own file for analysis.