Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd5f00400a25f1ec…

MALICIOUS

PDF

46.0 KB Created: 2021-05-10 15:22:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ff6de74ae72c86692a98899134799929 SHA-1: 4cc26f92d4721548d4ccbfd68a80f62ffdd4b012 SHA-256: cd5f00400a25f1ec79fc937d7f242b4a64364d89b8409b1480722598c09ae08c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and domains offering free in-game currency or hacks, such as 'free-coins-spins-on-coin-master-game-hack'. The document body, though partially corrupted, also contains a reference to this URL. The presence of numerous links to potentially malicious sites indicates a lure to download further malware or engage in phishing. No scripts were extracted, but the PDF structure itself contains malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/free-coins-spins-on-coin-master-game-hack In PDF document text
    • http://librarysenior.com//repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/hack-game-plus-com-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/daily-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://librarysenior.com//repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/blogger-free-spins-and-coins_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_off00004a01.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A01 30440 bytes
SHA-256: 8b861818b2909d9d1a9bbc553c0c95050e0345f055768c0e618f57528cc9cd69
font_01_sfnt_off0000886d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x886D 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off00009287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9287 17884 bytes
SHA-256: 2709d7507dedf16751127bf82807670e81eddbd263ed2ed49234c29c67e5f45e

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