Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d5e8429f6c62e84…

MALICIOUS

PDF

228.0 KB Created: 2021-07-05 03:56:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3b77a7f05ac1a58e50fc42eebbd60c9a SHA-1: 22b0de863ea04d68fc27fe1d9a80fe96af745672 SHA-256: 2d5e8429f6c62e845a9459f70f53805230489f143f67cb4b88a0ac617f8769e2
132 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it displays a fake CAPTCHA and a download button, common social engineering tactics to trick users into installing malicious software or visiting malicious sites. The embedded URL points to a site offering a 'Pokemon Go free download game hack', further supporting the lure. No scripts were extracted, but the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious download site.

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/to-pokemon-go-free-download-game-hack
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/master-coin-free-spin-daily_GM406889139.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/someone-hacked-my-robux-again_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/hacks-para-roblox-2021_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/collect-free-spin-linms-coin-master_GM406889139.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/derp-face-roblox-hacked_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/i-got-hacked-on-roblox_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/coin-master-hack-2021_GM406889139.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/press-one-button-to-get-free-robux_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/wwwfree-robux-for-kids_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/old-roblox-accounts-for-free_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/free-unlimited-robux-hack-working-2021_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/coin-master-spin-link-today_GM406889139.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/coin-master-card-hack-apk_GM406889139.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/flood-escape-2-infinite-jump-roblox-hack-pastebin_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/free-robux-hacker-us_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/coin-master-free-raid-link_GM406889139.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/how-to-free-robux_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/roblox-blue-adidas-shirt-free_GM431946152.pdf
    • https://elearning.mtsn7madiun.sch.id/__statics/gudangsoal/files/hacks-in-roblox-jailbreak-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00032373.bin
f3aa140bf5e391faeccd4ff39d3d084ccaa9474c1c219646735b46a9c7bdacb4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32373 25576 bytes
font_01_sfnt_off00035f73.bin
780a43704131cac39c136af2da69bdc2d555789037ff8242541cfbfd6e92db2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35F73 18940 bytes

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