Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7f55d45e611cf14…

MALICIOUS

PDF

45.5 KB Created: 2021-06-03 09:14:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f9ba8276884d3e67a513bf96880def48 SHA-1: 5058a3a8d91e903002955577587a077229bf69d0 SHA-256: a7f55d45e611cf144225c7203abf565d3edaeed8e2f82d2612c7d8628a0a6b1b
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a fake-CAPTCHA lure. 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 0.9864

Heuristics 5

  • 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.
  • 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
  • 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 https://netcdn.online/app/431946152/free-robux-generator-tool-game-hack PDF link annotation
    • https://www.wetotravels.com/uploaded_files/userfiles/files/minecraft-free-minecraft_GM479516143.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/roblox-comroblox_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/robux-codes_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/game-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-free-spins-through-coin-pop_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/como-hackear-coin-master-gratis_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/hack-para-coin-master-singapore_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/free-robux-just-click_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/hack-roblox-players_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.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
stream_004_off00005290.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5290 25996 bytes
SHA-256: 8bd5cbc54913eb388f328ed5bd8c5d18961fa2d937c88dcb9bd705b29dc8747e
font_01_sfnt_off00008f0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0D 18420 bytes
SHA-256: d95cfbf28fa562ebe1419590a53ed6fbdc89c56dc590e27e68fc0b689cc27181

Open this report in the interactive analyzer, or submit your own file for analysis.