Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dca4d03c6109f5c…

MALICIOUS

PDF

45.5 KB Created: 2021-06-10 21:33:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e80cb07521add66777866c462e5f7681 SHA-1: 52e6faadc0e8f11172217431cc457c6d5dcd159c SHA-256: 8dca4d03c6109f5c1a4f0db2c44450c300b5741a008e25877d9a6f5c6aac676a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document displays a fake CAPTCHA to lure users into clicking a link, which is a common social engineering tactic. The embedded URL points to a resource that likely serves as a download for a second-stage payload. While no scripts were directly extracted, the PDF structure and heuristics suggest it's designed to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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 https://netcdn.tw/app/431946152/best-free-stuff-in-roblox-game-hack
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/minecraft-free-download-iphone_GM479516143.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/robux-hack-no-human-verification_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/minecraft-bedrock-hacks_GM479516143.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-pet-food-hack_GM406889139.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-spins-11-01-2021_GM406889139.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/minecraft-nintendo-switch-digital-code-free_GM479516143.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-do-you-get-roblox-for-free_GM431946152.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/roblox-com-free-play_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/generator-robux_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/hack-master-coin-pc_GM406889139.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/oprewards-com-robux_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-cards-hack_GM406889139.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-generator_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/hack-coin-master-iphone_GM406889139.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-robux-redeem-codes-2021_GM431946152.pdf
    • http://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/free-tiktok-likes-and-followers_GM835599320.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-blogspot_GM406889139.pdf
    • https://elearning.mtsamanahruteng.sch.id/__statics/gudangsoal/files/robux-hack-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000053c0.bin
0629bf536a7704ea89ff00329b16c25ffb02f5815150476e03fb9911c063bd81		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x53C0 26872 bytes
font_01_sfnt_off00008f69.bin
fa0729ac0ecc49dbece6f04427f3d490a1eaddfe97dc3450b93d970627bc6cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F69 18192 bytes

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