Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98239377480f6e5…

MALICIOUS

PDF

33.4 KB Created: 2021-06-18 09:02:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 80b0609d396eb97fc2702614d1aa3df5 SHA-1: 11f01ba4f2b5ae4429a03f7837f7568beedcbf20 SHA-256: a98239377480f6e58a2996320adfbc7c2c85d67ac7e30c389ddcfe2a5f7d07e9
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that explicitly advertises hacks and generators for popular games, such as Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract users searching for cheats or exploits. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/roblox-strucid-battle-royale-aimbot-hack-2021-august-game-hack PDF link annotation
    • http://repository.unla.ac.id/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-daily-free-spin-and-coin-link-haktuts_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spin-and-coins-links_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-and-coins-com_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-ios-apk_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/www-free-robux-com_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-and-coins-for-iphone_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-roblox-pant-templates_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/avatar-the-last-airbender-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-make-your-own-shirt-on-roblox-for-free_GM431946152.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_off00002b4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B4C 21596 bytes
SHA-256: 20d3a5d58609acafa16f522c3f1ce872b269f3405285410cfac8d677525e5d64
font_01_sfnt_off00005a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A8F 20036 bytes
SHA-256: e3c753a20d4aad64d476b774a9040e38aff292a4d7e9886e6f15a3d8f9052ce6

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