Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec54c996ab0a9ed…

MALICIOUS

PDF

36.2 KB Created: 2021-07-01 17:34:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 17f9dac3e55024dc36d56ac9f3a57123 SHA-1: d721cdfc2c959d87834c9327eb5a19a97a534e38 SHA-256: eec54c996ab0a9edb6a90bfec22aa2a3bf4fa4f8ed46eb785de3bbd05f7a20b5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • 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.co/app/431946152/free-robux-no-human-verification-game-hack PDF link annotation
    • https://ghevanphongdep.vn/public/upload/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/a-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-robux-no-gift-card_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-costumes-free_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-robux-no-email_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-hacks-for-mad-city_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-assassin_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-free-d_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/app-free-robux-google-play_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/whatever-floats-your-boat-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-money-hack-download_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/how-can-you-get-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/roblox-t-shirt-free_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/triga-cheat-roblox_GM431946152.pdfIn PDF document text
    • https://ghevanphongdep.vn/public/upload/files/how-to-hack-linkmon99-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000342a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x342A 22968 bytes
SHA-256: 32ce695e5d053dd7fb85bc2e731d5caaa24e52ded81f6b74e62f3a2d7c14b195
font_01_sfnt_off000067e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67E5 19336 bytes
SHA-256: e243cfcdc54e382fec4f8f21d925e3da2d85a56f2aa27bb221d3bf3adc5c4862