Malicious PDF — malware analysis report

Static analysis result for SHA-256 480092ec8714e9e7…

MALICIOUS

PDF

34.4 KB Created: 2021-07-04 21:42:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c9f7337b0f56e2c94d54f580cd0c533b SHA-1: a37e3e6c36f5acea98f46418577971b19ccc96d7 SHA-256: 480092ec8714e9e7e79bb855191417438c61a79c7a62a1173d905d7f767bce8c
220 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to trick users into clicking malicious links. The primary link directs to a known malicious redirector, which in turn hosts a large collection of other PDFs designed to appear as legitimate game-related content but likely serve as a link farm for further malicious redirection or phishing. No scripts were extracted from this sample, but the document's structure and embedded links strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/406889139/coin-master-free-spins-and-coins-app-game-hack In PDF document text
    • http://lib.mappifhui.org/repository/roblox-user-hacking-toon_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-spin-link-free-download_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-hack-roblox-with-windows-7_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robux-glitch-hack_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/lua-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-guest-shirt-free-shipping_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/coin-master-hack-version_GM406889139.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/roblox-hack-2021-admin-commands_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-cheat-engine-to-work-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://lib.mappifhui.org/repository/hacks-for-legends-of-speed-roblox-download-pc_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_off00003152.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3152 22556 bytes
SHA-256: 03481eb43050c772434c1583f250c79cf61153a9f215b226f40a568fb50df99e
font_01_sfnt_off00006381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6381 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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