Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dee37bef8e4c2d1…

MALICIOUS

PDF

44.0 KB Created: 2021-06-03 20:01:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 09ca8729df5a2b6e0c3858b32c267080 SHA-1: e626bb5998ea2d38cbb45dc897894b718b8116ef SHA-256: 8dee37bef8e4c2d18cc32df50b28f040e0aa210219b04f8fcaa0ead7b6c0cc05
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which appear to be part of a link farm designed to attract users with promises of free in-game currency. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to redirect users to potentially harmful content or phishing sites. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/free-coin-spin-daily-link-coin-master-game-hack
    • http://otomasi.stikesmuhgombong.ac.id//repository/roblox-studio-free-robux_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/how-do-you-get-free-robux-2021_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/coin-master-in-app-purchase-hack_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/free-robux-master_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/can-i-play-minecraft-for-free_GM479516143.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/claim-coin-master-free-spins_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/coin-master-hack-without-verification-code_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/free-minecraft-worlds_GM479516143.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/free-headless-head-roblox_GM431946152.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/get-free-coins-for-coin-master_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/coin-master-hack-tool_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/free-coin-master-cards-link_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/real-hack-for-coin-master_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/free-game-pack-coin-master_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/free-spins-coin-master-no-human-verification_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/coin-master-hack-mod-apk-download_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id/repository/daily-spins-coin-master_GM406889139.pdf
    • http://otomasi.stikesmuhgombong.ac.id//repository/roblox-apocalypse-rising-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004f72.bin
aa5bc25a5e3c8aea5c28b0b998d471eae00a97c0492858433fb3d9f87c682817		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F72 24852 bytes
font_01_sfnt_off000088d8.bin
9d60a2e782eeb8051ddff45576a6e1a66ba7dfa86d66828505d8c060f58b239a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88D8 18476 bytes

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