Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f650438d1155de9…

MALICIOUS

PDF

36.7 KB Created: 2021-07-09 04:16:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e4e7c8fc470c7a916294d5bcc61836c2 SHA-1: 09ae64edd90b6f607b3f3fca4eead12dd536dee6 SHA-256: 4f650438d1155de9061679f889a2948d624054ae69ab366d7c74c8432b064452
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, masquerading as a "Coin Master Hack No Survey" generator. The presence of these links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful websites. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

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-hack-no-survey-game-hack In PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/install-free-game-coin-master_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-how-to-get-free-robux-ios_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-gift-card-codes-pastebin_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/mocap-dancing-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-a-free-vip-server-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/earn-free-robux-for-roblox-robloxwin_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/google-chrome-free-robux_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/free-tiktok-fans-no-human-verification-ios_GM835599320.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/pokemon-go-free-username_GM1094591345.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/roblox-free-clothes-generator_GM431946152.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/is-tiktok-free-to-install_GM835599320.pdfIn PDF document text
    • http://www.tamimaudit.com/uploaded_files/userfiles/files/coin-master-on-facebook_GM406889139.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
stream_002_off0000383a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x383A 23172 bytes
SHA-256: 25aa9cd46888c7c7192d46faa278f6b86de5553f31cf036c8530b7bcbaa2f451
font_01_sfnt_off00006c3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3F 18440 bytes
SHA-256: b730959ae3980318038e04d6756c59d667f8505816f45f5bcba77c928df63dad

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