Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbf821fbc75d7b70…

MALICIOUS

PDF

36.0 KB Created: 2021-06-18 19:16:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: afff12e6fb266e08a90382e14e881d3c SHA-1: da9e1a3cd526990d288df93b5b5f4bece8553efb SHA-256: fbf821fbc75d7b705a0fd69c216805c22e5c3336425f8bb8712bd9a18ac846c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains links to a known malicious redirector, masquerading as a generator for game hacks and passes. The document body and embedded URLs suggest a lure for users seeking in-game advantages, which is a common social engineering tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

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/roblox-free-gamepass-script-october-2021-game-hack In PDF document text
    • https://alimi.com.tw/upload/files/roblox-cheat-engine-speed-hack-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-free-robux-no-points_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/minecraft-app-free-download_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/minecraft-windows-10-edition-free-download_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-xbox-one-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-claim-now_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-hacked-cliient_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/robloxbux-us-generator_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/facebook-roblox-hack_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003294.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3294 23056 bytes
SHA-256: 6da90d0695ffadff8bf0d64f6c1af01f0de8ea5c819ca46091e3cc44df5a2ae1
font_01_sfnt_off0000665e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665E 19528 bytes
SHA-256: 1dbe3a412977dbcf363b126e645a699eb12dee44819bdeedb47a59f4f2390652

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