Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa8491a916721ba…

MALICIOUS

PDF

44.4 KB Created: 2021-06-04 01:25:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 143c4b94ad43d941b807c3b838facd5b SHA-1: aae6fbcc8df384ff30313092e21c350a36909088 SHA-256: 7aa8491a916721bada1f0e85f221a4382fe4da11d54e06899b633546c8189cd0
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified as a link farm, that point to external websites. These links are designed to lure users into clicking them by promising free game currency or cheats. The ML classifier also flagged this PDF as malicious with high confidence.

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/coin-master-free-spins-and-coins-link-haktuts-game-hack
    • http://library.stieyapan.ac.id//repository/free-spin-codes-coin-master_GM406889139.pdf
    • http://library.stieyapan.ac.id//repository/minecraft-pe-hack-client_GM479516143.pdf
    • http://library.stieyapan.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://library.stieyapan.ac.id//repository/moonactive-free-spins-coin-master_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdf
    • http://library.stieyapan.ac.id//repository/coin-master-hack-tool-pc_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/how-to-download-minecraft-hacks_GM479516143.pdf
    • http://library.stieyapan.ac.id/repository/moonactive-free-spins-2021_GM406889139.pdf
    • http://library.stieyapan.ac.id//repository/coin-master-rewards-app_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdf
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-no-survey_GM431946152.pdf
    • http://library.stieyapan.ac.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdf
    • http://library.stieyapan.ac.id/repository/www-bandicam-com-free-robux_GM431946152.pdf
    • http://library.stieyapan.ac.id/repository/free-rare-cards-for-coin-master_GM406889139.pdf
    • http://library.stieyapan.ac.id//repository/master-coin-free_GM406889139.pdf
    • http://library.stieyapan.ac.id/repository/get-free-robux-com_GM431946152.pdf
    • http://library.stieyapan.ac.id/repository/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005284.bin
79bbcd61ccd7240c3d73c78c0b7c7ccce95610c06e5b23f84a796dfc773efae6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5284 24532 bytes
font_01_sfnt_off00008ae4.bin
d0160522c9507928c114f36e82183f3878c9bb5f52b4c502e96d0270f56f9c5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE4 18372 bytes

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