Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4583695dc35b2f…

MALICIOUS

PDF

44.1 KB Created: 2021-05-14 22:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 727f4c85867e09af873e2b5029a5dc85 SHA-1: 6b3c225f04f7835e63a763e2bd6fdcfab5c0a7ae SHA-256: 7d4583695dc35b2f56242f761dfb12a8bbdc749c33880431472412809420b756
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generator / game hack' lures. The primary redirector URL is https://netcdn.xyz/app/406889139/twitter-coin-master-free-spins-link-game-hack. The document's structure and embedded links suggest it is designed to trick users into visiting these malicious sites, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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 https://netcdn.xyz/app/406889139/twitter-coin-master-free-spins-link-game-hack In PDF document text
    • http://www.buapit.ac.th/UserFiles/File/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-codes-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/flame-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-cheats-pc-2021_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/minecraft-free-ios-no-verification_GM479516143.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/coin-master-attack-block-hack_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://www.buapit.ac.th/UserFiles/File/master-coin-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000486c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x486C 24356 bytes
SHA-256: 2184e6b969734502029cedadd631466ba71dfa42367887713e9b02ed40e352f6
font_01_sfnt_off00007fde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDE 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off000089f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89F7 18220 bytes
SHA-256: 52ffbd88cc2cac306fe82121e7a954d434fc7a4bd2ad0f2292b5f4c74619d21b