Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6aba3d943f0bbef…

MALICIOUS

PDF

227.9 KB Created: 2021-07-05 18:41:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4c5165d06ee779321a70e83e3bc3645e SHA-1: c8fe5e59a335f57dea0d36087d290a4e1b93f495 SHA-256: e6aba3d943f0bbef126ced9459f472f7702d2f05b15b1a3c35a48de0b9d6cc60
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The document employs social engineering tactics by presenting a fake CAPTCHA and a browser update lure to trick the user into clicking a link. The embedded URL directs to a site offering hacks for games, suggesting a lure for potentially malicious downloads or further compromise. No scripts were extracted, but the PDF structure and heuristics indicate a malicious intent to redirect users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/1094591345/pokemon-go-free-in-app-purchases-game-hack
    • http://muslib.unmus.ac.id/repository/free-robux-cheat-download_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-coins-link-2021-deutsch_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/roblox-system_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-roblox-game-no-dowload_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/roblox-pink-free-robux_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-links-for-today_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/how-to-get-free-robux-using-cheat-engine-64_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-no-survey_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/coin-master-free-spins-twitter_GM406889139.pdf
    • http://muslib.unmus.ac.id//repository/minecraft-apk-free-download_GM479516143.pdf
    • http://muslib.unmus.ac.id//repository/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://muslib.unmus.ac.id/repository/get-free-robux-fast_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-gift-cards-robux-codes-no-survey_GM431946152.pdf
    • http://muslib.unmus.ac.id//repository/how-to-get-java-minecraft-free_GM479516143.pdf
    • http://muslib.unmus.ac.id/repository/roblox-cheat-codes_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/hacks-impulse-testing-roblox_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-denis_GM431946152.pdf
    • http://muslib.unmus.ac.id/repository/free-robux-money-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00032383.bin
d74303b96b9eefd40f639cdade7dfdb38b561f38acf8a57ac28010da723a337e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32383 25576 bytes
font_01_sfnt_off00035f84.bin
e543a1f0b8a0bcaf76b5eeab40c59c6e9e754cf3ab0c94e733624d4aaec024d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35F84 18840 bytes

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