Malicious PDF — malware analysis report

Static analysis result for SHA-256 63a7063513debd66…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 14:56:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bf22be756f5a2e30a66bf10b6b3cce86 SHA-1: ac9e4227ae8486a190ce77dd84c3f4d85f0de9f4 SHA-256: 63a7063513debd669b1a66b3db182149d6491ed6daf110979ca0ec247a2ba2b5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are part of a link farm, suggesting a malicious intent to redirect users to potentially harmful websites. The document body and extracted URLs focus on game cheats and free items, a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-promo-codes-game-hack
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-cheats-2021_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-away-with-hacking-in-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-gift-card-codes-2021-april_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-cards-for-free_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/hacking-roblox-accounts-passwords_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-free-boy-hair-not-model_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-do-u-speed-hack-in-mm2-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/como-meter-hacks-a-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-free-robux-in-adopt-me_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/what-tiktok-free-will_GM835599320.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-any-item-for-free-in-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/hacks-roblox-jailbreak-2021_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-heaven-free-spins_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-hacker-us_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-model-roblox-games_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/my-roblox-account-got-hacked-flamingo_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/level-hack-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-rich-in-roblox-accounts-with-limiteds-dump-2021-working_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-cheat-engine-64-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ec6.bin
01c5b3efc9c5dc6ce6afdc920d0ccb0fb007bc728a6484c496840d86395f10be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC6 22496 bytes
font_01_sfnt_off000060f7.bin
b8217d46ff736f49d3e7fbbf4ad016b5c147b05ee0ff1e8951011688dc8d1bae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60F7 19304 bytes

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