Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3d7843169aae5c…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 11:06:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f0c25371617b95f375e55b1f1d9d6857 SHA-1: ad8c7de25ae2620ef041a92e2c5a57f56dabd1f8 SHA-256: ef3d7843169aae5ced79a5817a80af573ef22de0ca3910341c61c1214396617e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous SEO-optimized links, many of which point to pages offering game hacks or cheats, suggesting a lure for users to download potentially malicious files. The presence of an external URI and the ML classifier's high confidence score indicate malicious intent. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or malware distribution attempt.

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/479516143/free-minecraft-education-edition-game-hack
    • https://pustaka.widyakartika.ac.id/repository/how-to-hack-speed-race-roblox_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-robux-on-roblox_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/tbc-oil-platform-roblox-free_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/roblox-how-to-get-free-obc-2021_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/coin-master-hack-unlimited-spins-game-download_GM406889139.pdf
    • https://pustaka.widyakartika.ac.id/repository/coin-master-free-link-blogspot_GM406889139.pdf
    • https://pustaka.widyakartika.ac.id/repository/hacking-someones-account-roblox_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/roblox-cb-r-hack-menu_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/roblox-free-exploits-v3rmillion_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/free-800-robux_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/free-robux-750k_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/free-robux-no-offers-or-survey-2021_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/how-do-u-get-free-robux-on-roblox-2021_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/roblox-ios-robux-hack_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/hacks-for-hhcl-hockey-roblox_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/roblox-free-mouse_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/coin-master-spin-link-today-free_GM406889139.pdf
    • https://pustaka.widyakartika.ac.id/repository/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/how-to-change-your-username-on-roblox-for-free_GM431946152.pdf
    • https://pustaka.widyakartika.ac.id/repository/free-promo-codes-roblox-april-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003162.bin
6c27b92c2347c2ed1a7322ff7aaacdcea15f8aaaa15d5bd56e556e6bc8243e3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3162 22404 bytes
font_01_sfnt_off0000634a.bin
ea04fd3d915771084383886fc7ce1b63e4bd6f30d828a1dfcfd5e13c50d9d279		 pdf-font-stream PDF embedded font (sfnt) at offset 0x634A 18312 bytes

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