Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a8ec065854ae499…

MALICIOUS

PDF

43.4 KB Created: 2021-05-11 00:41:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0f0624d6de2b9ecfbc7e20cd183199d0 SHA-1: 446cd19b5a5740e85025d30d594053941336a8a6 SHA-256: 4a8ec065854ae499d509114c9b2a63446048b5748dd97a1541d79b2781bc96e8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to known malicious infrastructure, specifically promoting game hacks and cheats. The document body and embedded links suggest a lure to download potentially unwanted or malicious software. The presence of multiple redirector links and the ML classifier output strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/hack-version-coin-master-apk-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-windows-10-edition-hacks_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-builders-club-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/mc-hacks_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-coins-and-spins-link-for-coin-master_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_003_off00004df5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DF5 25032 bytes
SHA-256: 7db680adc0bb46f0922eba43cc0fbbb210ba7ad4d075c4e64f85280873081b00
font_01_sfnt_off00008803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8803 18028 bytes
SHA-256: 3f168c1f6698dcf2dd7090d469e87ca8ddd6c2d99ef7bd4e7b306b99a7cfc93f

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