Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b285298f7aa29e…

MALICIOUS

PDF

48.9 KB Created: 2021-06-10 17:36:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 729cd5a92a354126db6c8d78423e8606 SHA-1: ab2ead59f067f6a510ebb32a8c5b56b362f4a842 SHA-256: 38b285298f7aa29e71c1061b15ece5b1dddb44f34397d4dd02c06a138c9ccf73
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF gateways. The document body and extracted URLs suggest a lure related to game cheats and hacks, likely intended to direct users to malicious content or downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-bloxburg-cheat-engine-game-hack
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/roblox-free-roam-games-grand-bloxs_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/roblox-free-download-for-laptop_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/free-tiktok-likes-without-verification_GM835599320.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-facebook_GM406889139.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/how-to-hack-to-get-robux_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/roblox-hacks-deutsch_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-java-edition-for-free_GM479516143.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/how-to-hack-a-roblox-account-2021_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/descargar-hacks-para-roblox-pc_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/minecraft-games-to-play-for-free_GM479516143.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/roblox-cheat-engine-robux-no-survey_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/coin-master-free-spin-ml_GM406889139.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/free-rich-roblox-accounts-2021_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free_GM479516143.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/roblox-hack-the-free-generator-robuxgaminghacking_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/free-minecraft-codes-2021_GM479516143.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/free-robux-website-no-survey_GM431946152.pdf
    • http://elearning.maspro.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053c5.bin
ae728024dd06e0b37a27b4d7ddab0902f58f7d39eead93e14fbd5512e8f2e51a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C5 26256 bytes
font_01_sfnt_off00008e55.bin
40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E55 3884 bytes
font_02_sfnt_off00009afd.bin
29c2d41e60e2e64edec25b89910aa13856f735a5adaadd48228fa6c29237337d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AFD 18832 bytes

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