Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c187fae19c22863…

MALICIOUS

PDF

33.5 KB Created: 2021-08-01 01:33:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2bed05f19cf86639c81cbde7620b18bd SHA-1: d01ecda9a9fe926aa9d7440502f4f609a4e3223e SHA-256: 8c187fae19c22863ac4cb549c90bf4770dee7a69318350bf98fe3bb7ecc8f457
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and hacks to trick users into clicking malicious links. The document contains multiple embedded URLs pointing to redirectors and potentially malicious content, such as 'http://netcdn.tw/app/431946152/roblox-jailbreak-hack-game-hack'. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to harmful sites.

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/roblox-jailbreak-hack-game-hack In PDF document text
    • http://petrorang.com/admin-panel/products/images/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/robux-hack_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-tiktok-followers-no-human-verification_GM835599320.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://petrorang.com/admin-panel/products/images/files/robux-free-co_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_off00002d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7B 22612 bytes
SHA-256: 68d73a9c3a1d0a3af5620431c2a9d1a901d590e21e6ac6e8979e6fcf9eb46bd3
font_01_sfnt_off00005fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE8 18652 bytes
SHA-256: 238776d81d7079e64501f357c145a468ea3a1220ca00fff69d40e8c1a53c01cc

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