Malicious PDF — malware analysis report

Static analysis result for SHA-256 6529bfaa6af4da55…

MALICIOUS

PDF

41.9 KB Created: 2021-06-14 01:00:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ac1a4b72ef41719a0637f31c97107ca1 SHA-1: 2003f90db889125d3e6a6d7bfd497879b7c7aa24 SHA-256: 6529bfaa6af4da551e04f57de6721fd597a476ef21398965ead6dc7d40025f72
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are SEO-optimized and point to gaming-related hacks and cheats, suggesting a lure for users seeking such content. The presence of a fake CAPTCHA heuristic indicates an attempt to trick users into interacting with the document, likely to initiate a download or redirect to a malicious site. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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 http://netcdn.co/app/431946152/blox-gg-free-robux-game-hack
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/earn-free-robux-for-roblox_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-hack-using-lucky-patcher_GM406889139.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-hack_GM406889139.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-18_GM479516143.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-robux-com-roblox_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/roblox-piano-hack_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/wurst-client-112-2_GM479516143.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-spin_GM406889139.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/free-promo-codes-roblox-june-2021_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/can-you-get-robux-for-free_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/how-to-make-your-roblox-character-look-cool-for-free_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/roblox-promo-codes-free-robux_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/roblox-redeem-card-codes-free_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-march-2021_GM406889139.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/my-minecraft-account-was-hacked_GM479516143.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-new-cards-hack_GM406889139.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/codes-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn4kotajambi.sch.id/__statics/gudangsoal/files/coin-master-free-coins-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049c3.bin
e5d56b9db5f149ddeded098790c7c36c185e38b6554fe6b439680c40295b6d37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49C3 24464 bytes
font_01_sfnt_off00008136.bin
b933d933a9060f942735f947e291d32fed9a0547be2e619c4457d97fefc51af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8136 18376 bytes

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