Malicious PDF — malware analysis report

Static analysis result for SHA-256 4faeedbb259ca770…

MALICIOUS

PDF

33.4 KB Created: 2021-07-04 06:57:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4b16c02b6ba4da1b61ee72c357f1f919 SHA-1: d6371d71fe1fe5a4d2aec1035ec5bb4862b56e03 SHA-256: 4faeedbb259ca770f46e87adca022864ce52e590f20236c3089ea7907ea7b615
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body, though partially garbled, includes the same URL, reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the primary attack pattern involves redirecting the user to a malicious URL.

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/431946152/easy-free-robux-generator-game-hack In PDF document text
    • http://new-era.com.tw/image/data/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-minecraft-thumbnails_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-2021-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-get-free-robux-on-roblox-december-2021_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-get-free-robux-in-adopt-me_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/synapse-hack-roblox-anti-ban_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/tiktok-free-like-generator_GM835599320.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/krnl-roblox_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/how-to-download-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/roblox-red-shirt-free_GM431946152.pdfIn PDF document text
    • http://new-era.com.tw/image/data/files/free-roblox-shirts-template_GM431946152.pdfIn PDF document text
    • https://new-era.com.tw/image/data/files/descargar-hack-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
font_00_sfnt_off00002e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E68 21680 bytes
SHA-256: 22d28decd668dbdbf6d499683387602e030224f603d70cdae8b03be5c66da496
font_01_sfnt_off00005e03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E03 18812 bytes
SHA-256: 227edf075e58488d8e0d792464349d3728ac3597596b46f25fa5129c6cbdcdf0

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