Malicious PDF — malware analysis report

Static analysis result for SHA-256 f53c77ef3a36f6f5…

MALICIOUS

PDF

227.4 KB Created: 2021-07-09 04:07:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: fdf933e965975bcc90f50893bc01b90e SHA-1: bdab409743f284d3845a4abbad7add951b11da6e SHA-256: f53c77ef3a36f6f5fd561817bc521f8186a0a961e65374df0e775a9a42c12464
132 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a social engineering attack, including a fake CAPTCHA and a lure to install a browser extension or update. It also contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or phishing page. The document's content and heuristics strongly suggest an attempt to trick the user into a harmful action.

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-and-nintendo-switch-game-hack
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-robux-2021-ios_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/claim-roblox_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/pastebin-free-robux-working_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-robux-hack-no-human-verification_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/roblox-site-hacks_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/roblox-hack-level-7-download_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/roblox-inappropriate-games_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/minecraft-free-android_GM479516143.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/robuxlove-net-free-robux_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/roblox-granny-speed-hack_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/roblox-deathrun-cheats_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-roblox-hack-us_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-app_GM406889139.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/roblox-redeem-robux_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-robux-planet_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/earn-free-robux-today_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/mathep_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/hack-coin-master-game-apk-download_GM406889139.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/free-premium-roblox_GM431946152.pdf
    • https://elearning.mtsn1lahat.sch.id/__statics/gudangsoal/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off000320f1.bin
f3abe0d1cd22625c049d334bb86b7b093d7575300b0c633d80e234acb80b5807		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x320F1 25576 bytes
font_01_sfnt_off00035cf6.bin
a5d1c1268d7fd71d3e1446ac35e13af8a99a3122a390149a9dc5de7501682525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35CF6 19084 bytes

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