Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e3a19d0486db82b…

MALICIOUS

PDF

34.9 KB Created: 2021-06-29 07:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4721674e9ab7be6cec10b15f3f59fe13 SHA-1: 60d66cc7abe111c677e0b7d18c8d4da442c7c81a SHA-256: 5e3a19d0486db82b4388451011f475ce7a79ac76d9b958f28d33f2c80810d117
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links, including one pointing to known malicious redirector infrastructure at http://netcdn.co/app/431946152/admin-commands-roblox-free-game-hack. This indicates a lure to download or execute further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious links suggests the document is designed to redirect users to potentially harmful websites.

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.co/app/431946152/admin-commands-roblox-free-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/download-coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-an-invisable-head-in-roblox-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-hack-roblox-scripts_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-lifting-simulator-free-vip-server_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-many-levels-in-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-game-2021-free-spin-link_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/lion-studio-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/fly-hack-download-roblox-2021-gameguardian_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_off000031a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A4 22468 bytes
SHA-256: 2ad985a119e13b31251c2efa1560a2aa58c2dd298ee3196934a0afb6f5a83394
font_01_sfnt_off0000632b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x632B 19204 bytes
SHA-256: bfc20c32751735824266c560552c1a185b8e568b43d71d760c5cdf3d3de4dcd6

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