Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d140004e21bb95a…

MALICIOUS

PDF

33.2 KB Created: 2021-06-20 10:02:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6f41d0bf936ac020f291732ed20bf9b3 SHA-1: a0579ea7446647387de8579393b2027d6779f64d SHA-256: 6d140004e21bb95a6ebb8c6b853b94ad97f3d72e3a3b70f97738268ac690ddc0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and currency to trick users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts multiple other PDF documents with similar lures. The document's content and embedded URLs strongly suggest a phishing or scam campaign aimed at users interested in popular online games.

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.co/app/431946152/hack-skin-roblox-free-game-hack In PDF document text
    • http://huananhai.net/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-spin-hack-no-verification_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/roblox-how-to-get-free-obc_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/hack-roblox-retail-tycoon_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/how-to-create-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://huananhai.net/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/2021-free-robux-today-hack-created-by-robuxian_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/roblox-free-iron-man_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/hack-money-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://huananhai.net/images/roblox-group-gets-hacked_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/how-do-you-get-robux-on-roblox-hack_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://huananhai.net/images/free-roblox-outfits-2021_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_off00002bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCE 22268 bytes
SHA-256: ec2bd5e8ded4ecd0baf1e0e8c3daaa746ea05058155d5095d79f371694ba8c77
font_01_sfnt_off00005d28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D28 18940 bytes
SHA-256: f5e344b1c07936c9cc1ca9d7187d45fa114f76ec4dec6fe376bee94722ac44af