Malicious PDF — malware analysis report

Static analysis result for SHA-256 9182d8ad69984c5a…

MALICIOUS

PDF

46.5 KB Created: 2021-06-11 12:03:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 234d61024b13377956d39299f4e6ee1b SHA-1: 0e25017bb542cf52235a2dbda865529d9688fd70 SHA-256: 9182d8ad69984c5ad7d471da2c933aab32458b61dd771035a9c07d468b6d1d19
102 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to other PDF documents with SEO-friendly titles related to games and hacks. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content. The primary URL, https://netcdn.tw/app/431946152/robux-for-free-glich-game-hack, is likely the entry point for a scam or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.tw/app/431946152/robux-for-free-glich-game-hack
    • http://muslib.unmus.ac.id//repository/hacking-apps-for-roblox_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/2021-roblox_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/app-store-coin-master-free-spins_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-only_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/all-free-items-in-roblox_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-link-today_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/gold-card-coin-master-free_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/rbx-place-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/free-spin-in-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/minecraft-pe-hacked-client-download_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/free-roblox-characters_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-roblox-app_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-cards-link-2021_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-android_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/how-to-hack-coin-master-with-game-guardian_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/free-roblox-generator_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-promo-code_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/como-ser-hacker-en-roblox-jailbreak-2021-mayo_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000522a.bin
fecc117cbb94e5e827d7f012d113d17d712c5d55518c259d1656cc87c80ac1d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x522A 28384 bytes
font_01_sfnt_off00009368.bin
af686a31e674dc226c5173d081ae746c36eae0d4a4e3aa87c3965477ac1f5764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9368 18376 bytes

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