Malicious PDF — malware analysis report

Static analysis result for SHA-256 2536c8421de57d59…

MALICIOUS

PDF

36.2 KB Created: 2021-06-19 13:27:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fe10c3f9ba7f8534b854714e8ca5b2f4 SHA-1: 77d906e2a46e343d5282ca33bd929771407c6c29 SHA-256: 2536c8421de57d59cc24b856ea9a5d62b119c711a612525dee939950d9fbefaa
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are presented as lures for free in-game currency or hacks for popular games. The ML classifier and the PDF link farm heuristic strongly indicate malicious intent. The document body, though partially corrupted, contains text related to 'Free Robux' and references to malicious URLs, reinforcing the phishing and potential malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/get-free-robux-from-roblox-game-hack
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-hack-link_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-spins-coin-master-legit_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-daily-spins-and-coins_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-spin-generator-tool_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-speed-hack-on-roblox-mac_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/cmo-hackear-el-roblox-para-tener-robux-en-un-mvil_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/tiradas-coin-master_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-fan-hack_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-marketplace-sell-for-free_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdf
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-items-2021_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-shirt-templates-roblox_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/free-robux-gen_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/minecraft-hacks-18-9_GM479516143.pdf
    • http://digilib.stie-yppi.ac.id/repository/robux-scam_GM431946152.pdf
    • http://digilib.stie-yppi.ac.id/repository/how-do-u-get-robux_GM431946152.pdf
    • https://www.roblox.com/.I
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000035bc.bin
c453244a2668d07db3277e1cc50dfb9b247d8efeb6f183a66d92ad6425a3a5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35BC 22588 bytes
font_01_sfnt_off0000682d.bin
4a1b984803bb2d6866aa2b9fb6e9878e5fd827f993abd75cca169cec473b5a17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682D 19152 bytes

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