Malicious PDF — malware analysis report

Static analysis result for SHA-256 610361f68a37c24b…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 23:43:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 73f059823e37023f13d11148ad9ecbe8 SHA-1: 3692e9cc37a8ed6bfd3cd30aa512786c300ed991 SHA-256: 610361f68a37c24b60c68e24fad62f09f199776089888ea44f055bee118f7e3e
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that masquerade as guides for obtaining free in-game currency or hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a link farm designed to attract users searching for cheats. The ML classifier also strongly flagged this PDF as malicious. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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.tw/app/406889139/how-to-get-free-spins-on-coin-master-hack-game-hack
    • http://perpus.fisip.unnur.ac.id/repository/download-roblox-free-latest-version_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/como-hackear-roblox-en-pc-para-tener-ventajas_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-online-free-download_GM479516143.pdf
    • http://perpus.fisip.unnur.ac.id/repository/how-do-i-get-free-robux-without-hacking_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-roblox-accounts-on-ipad_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/roblox-free-stylish-animation_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/pubg-uc-bc-com_GM1330123889.pdf
    • http://perpus.fisip.unnur.ac.id/repository/hacker-face-roblox_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-no-survey-or-email_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-claim-now_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/free-minecraft-account-list_GM479516143.pdf
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spin-today_GM406889139.pdf
    • http://perpus.fisip.unnur.ac.id/repository/free-roblox-jailbreak-codes_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/what-is-robux-in-roblox_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/free-base-roblox_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-people-in-roblox_GM431946152.pdf
    • http://perpus.fisip.unnur.ac.id/repository/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ffd.bin
051fb1006bfa2440701e98d02c454a8fcc47f584e351712d136760b64392ca24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FFD 23440 bytes
font_01_sfnt_off000064da.bin
49bb361051a993f9084e846f2e5cc7d9ef6f782e1735768e7a619114b4d1f8ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DA 18508 bytes

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