Malicious PDF — malware analysis report

Static analysis result for SHA-256 1383ea4d11d37502…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 08:15:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b65f46113e9eec6ece19321239ac27a6 SHA-1: 8be90a3d5bebb724aa557429ac0391f1e065f54a SHA-256: 1383ea4d11d37502c5a6208f279d49ae77175dd6df9a7df939d45849101f48ad
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are SEO-optimized and point to other PDFs, suggesting a link farm designed to distribute malicious content. The document body explicitly mentions "Free Hacks For Coin Master" and includes a URL pointing to a similar download, indicating a lure for potentially unwanted or malicious software. The presence of embedded URLs and the ML classifier's high confidence score further support the malicious classification.

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/free-hacks-for-coin-master-game-hack
    • https://digilib.widyagamahusada.ac.id/repository/roblox-cheats-doawnload_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/hack-de-mad-city-roblox_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/hack-for-hoops-beta-roblox_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-pc-2021-download-generator_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-to-use-python-to-hack-roblox_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/roblox-ss-executor-free-v3rmillion_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/roblox-lifting-simulator-cheat_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-free-spins-only_GM406889139.pdf
    • https://digilib.widyagamahusada.ac.id/repository/hack-robux-in-2021-easy_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-free-spin-codes_GM406889139.pdf
    • https://digilib.widyagamahusada.ac.id/repository/youtube-how-to-get-free-robux_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-to-be-headless-in-roblox-2021-for-free_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-speed-hack-in-roblox-booga-booga_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/free-roblox-bazooka_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/roblox-hack-robux-generator-ipad_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-no-generator_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/free-promo-codes-roblox_GM431946152.pdf
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-for-account_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000336b.bin
128b635f1c3d13ed69875ec9f03bc74c4ed819ed2d740e0b446ccda9c04273d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x336B 22792 bytes
font_01_sfnt_off0000662f.bin
1e436942c22cf5f1ddb993b5625de9063034e514cb54256dfb31bec93a9ee0e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662F 18168 bytes

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