Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c5e6de998690fa…

MALICIOUS

PDF

226.5 KB Created: 2021-07-09 20:11:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6e9506e6efd37ccc7fd6acb02b742fed SHA-1: d4df2dec0512e6fb08fe683cd8185bb7e15cda19 SHA-256: 71c5e6de998690fa5353e81a574afbfcd09a6f07605074667d4ac6343bdfcb28
132 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA and a call-to-action button, luring the user to click a link to download a fake browser extension or update. The embedded URL points to a suspicious domain associated with game hacks, further indicating a social engineering attempt to compromise the user. No scripts were extracted, but the overall pattern suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0117

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-account-game-hack
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/roblox-hack-unlimited-robux_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-card-codes-2021_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/free-coins-and-spins-for-coin-master_GM406889139.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/coin-master-hack-spins-ios_GM406889139.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/roblox-sexually-abused_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/free-100-robux_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-pc_GM406889139.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/free-secret-roblox-name-pass-hack_GM431946152.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-by-playing-games_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/coin-master-free-spin-now_GM406889139.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/free-robux-roblox-account-generator_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/roblox-the-legendary-swords-rpg-cheat-engine-hack_GM431946152.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/free-robux-scam-bots_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/bloxton-interview-center-anti-cheat-roblox_GM431946152.pdf
    • https://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/robux-redeem_GM431946152.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/minecraft-hacked-client-18_GM479516143.pdf
    • http://e-learning.mtsn7kediri.sch.id/__statics/gudangsoal/files/roblox-hacked-version-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00031e4d.bin
ee3dbf15451e8b4f2e111caf399c49cc622c27b79645c37ec8de0dba4e5c8c91		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31E4D 25728 bytes
font_01_sfnt_off00035a80.bin
eb2eb7e6ed71f77c327fc61cb094d80bf0a8a760e777cfd3a9458c26f0382535		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35A80 18604 bytes

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