Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cba339b47906c1…

MALICIOUS

PDF

42.6 KB Created: 2021-05-14 22:08:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8291e65a179722f6cfc2725f31c68288 SHA-1: 6bba680b88d70b3c5b33ae01b5fb27cc30288061 SHA-256: 04cba339b47906c1d937b1fc60178698e6e52e4acbec04900226c0c480bd20b2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which appear to be part of an SEO link farm. The document body, though partially corrupted, suggests a lure related to 'Minecraft Clipart' and 'free game hack', while the embedded links point to 'coin master' and 'robux' related content. This indicates a likely attempt to drive traffic to these sites, potentially for advertising, SEO manipulation, or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/minecraft-clipart-free-game-hack
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/free-spins-coin-master-no-survey_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/80-free-spins-coin-master_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/coin-master-key-free-spin_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/coin-master-spins-and-coins_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/coin-master-free-spin-and-coins-links_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/get-coin-master-cards-free_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/coin-master-free-gift-cards_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/coin-master-free-spin-today_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/original-roblox_GM431946152.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/roblox-hack-apk_GM431946152.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/minecraft-pe-apk_GM479516143.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/coin-master-links-free-spins_GM406889139.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • https://e-learning.man5crbn.sch.id/__statics/gudangsoal/files/minecraft-alt-accounts-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004bee.bin
f7547661089aa8eedf51eb0c8d3506f3612faae3af56bd7255fe6f07b57b01c5		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4BEE 25348 bytes
font_01_sfnt_off000085f3.bin
91cd75b72efc4400f550dd169e429811ff3a09c689ab9966efef0c18f18efa2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85F3 17816 bytes

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