Malicious PDF — malware analysis report

Static analysis result for SHA-256 87d5986338b69d87…

MALICIOUS

PDF

27.1 KB Created: 2021-07-03 14:33:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 862041a37139a9edf7fce8fab211563e SHA-1: c2109515af05050fc38869f11f645efb5788b791 SHA-256: 87d5986338b69d87fc8e46a06806a7644a66f2c34bc3548f5cc27f2633417de7
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free currency'. The ML classifier strongly indicates maliciousness. The primary attack pattern involves luring users into clicking these links, which likely leads to further malicious content or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 3

  • 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.
  • 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-admin-hack-game-hack In PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/apoc-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-robux-games_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/hack-roblox-free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/roblox-earn-robux_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/how-to-get-free-robux-copy-and-paste_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-tiktok-fans-and-likes_GM835599320.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-robux-no-scam-no-survey-no-human-verification_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-robux-using-points_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-gift-card-10-25-50-roblox_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-gift-cars-for-roblox_GM431946152.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://trust.edu.vn/wp-content/uploads/imagesfiles/roblox-cerberus-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD8 22824 bytes
SHA-256: 16acbc4bfd1a0c2ae647f2f81660182a96518b6c1f45ab829ac912b40f8476f0