Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bfc72eb6c54ded8…

MALICIOUS

PDF

33.8 KB Created: 2021-07-06 04:20:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7956e66e45a2e624c2e8c393e0fc47ef SHA-1: f7d74d230589b720370fe24c0c4f4e3d8033ef07 SHA-256: 3bfc72eb6c54ded84aab317b6ad4495cbe1543f870c437ea312f07555807066a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks and free item generators. The primary lure is a 'Coin Master Spin Hack' which points to a known malicious redirector. This indicates a phishing or scam attempt designed to lead users to potentially harmful content or further malware downloads.

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/406889139/coin-master-spin-hack-without-verification-game-hack In PDF document text
    • http://astdubai.co/userfiles/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-prison-life-v2-02-hack_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-zone-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/como-hackear-roblox-para-tener-robux-2021-facil_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-app_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/coin-master-unlimited-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/synapse-roblox-free-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-tiktok-likes-no-human-verification_GM835599320.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-place_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/why-is-tiktok-free_GM835599320.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://astdubai.co/userfiles/files/free-robux-gift-card_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_off00002eb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EB1 22220 bytes
SHA-256: 3335f4bbe2cbc264d2d9fe8f6bc8abb01b7914ca3828437f49038c4b0f9e6739
font_01_sfnt_off00005fa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA6 18820 bytes
SHA-256: 92cf72ed7a186aaadd94887e1247b3d5c76ccdcbf70ae77d0bc88c96f4ecb94d

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