Malicious PDF — malware analysis report

Static analysis result for SHA-256 55e0ddae3509095b…

MALICIOUS

PDF

33.1 KB Created: 2021-06-28 18:13:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e9d7f62b4c768fd85509e642132feb14 SHA-1: c092d0fbba62e9be810427cbb9ee088cf4775c94 SHA-256: 55e0ddae3509095bf86ede4eabd6916dfb94e0fa4412fac2d82588680ce5cd36
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-games-free-admin-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/get-free-roblox-and-put-on-your-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-bee-swarm-simulator-hack-android_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-offline-free-download-pc_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/blox-event-world-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-faces-on-roblox-pc_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-ad-youtube_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/claimrobux-net_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/wurst-112-2_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-haiir-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/shirt-template-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-servers-that-work_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-copy-game-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/tiktok-free-fans_GM835599320.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C39 21604 bytes
SHA-256: df5fb4d92047ce8bb1a11e070a2137c1ed4e785b3355f2ad09854305b8ae35db
font_01_sfnt_off00005bd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD1 19204 bytes
SHA-256: 9462d898c6a8850dd4aad3a8c733d7755330c1feea4692a8a91f63c412f8527a

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