Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a93d5c2eba45246…

MALICIOUS

PDF

48.2 KB Created: 2021-06-03 11:37:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2a6e7a4e8028654464681a2e306022ec SHA-1: e26748f3cf53a0344a6d8a4a9fe7199409affcf0 SHA-256: 4a93d5c2eba4524652289a2c9d4a228fc146a100e2746ff799026f616a9a0c19
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF documents, suggesting a link farm designed to attract users searching for game hacks. The presence of a direct URL to a potential download, combined with the heuristic flagging it as a malicious PDF, indicates an attempt to trick users into downloading further malicious content. No scripts were extracted from this sample.

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.online/app/406889139/coin-master-online-hack-2021-game-hack
    • http://e-library.dharmawangsa.ac.id/repository/wahoogaming-co-free-robux_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/mcpe-master-hack-coin-apk_GM406889139.pdf
    • http://e-library.dharmawangsa.ac.id/repository/how-do-you-install-minecraft-for-free_GM479516143.pdf
    • http://e-library.dharmawangsa.ac.id/repository/robux-offer-wall_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdf
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-redeem-code_GM406889139.pdf
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-cards_GM406889139.pdf
    • http://e-library.dharmawangsa.ac.id/repository/hack-game-plus-com-coin-master_GM406889139.pdf
    • http://e-library.dharmawangsa.ac.id/repository/free-unlimited-coin-master-online-tool_GM406889139.pdf
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-free-spins-hack-download_GM406889139.pdf
    • http://e-library.dharmawangsa.ac.id/repository/download-minecraft-java-edition-free_GM479516143.pdf
    • http://e-library.dharmawangsa.ac.id/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdf
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-generator-for-roblox-2021_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/pubg-uc-trick_GM1330123889.pdf
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-hacks-for-gold-cards_GM406889139.pdf
    • http://e-library.dharmawangsa.ac.id/repository/free-robux-ad_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/robux-online_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • http://e-library.dharmawangsa.ac.id/repository/coin-master-cheat-engine-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051f0.bin
f635b6727dcb50627c5b8809c4e66a76c2f552c3786359e25d12b5b39c3d2dab		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51F0 27380 bytes
font_01_sfnt_off0000906b.bin
869414959d7b492e0f799b560e1731e3ab498bd286c28e9f0d2ec33d9b6cf53d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x906B 2812 bytes
font_02_sfnt_off00009a0a.bin
c749125a48438900fb9d2e9c83f982021f7c7aadfa00f74e48b95002be6a303d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0A 18192 bytes

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