Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1383a5deb4358c5…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 10:28:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8d9f302566b6553093e249e5d1a2bb3c SHA-1: 16d65098d3f45536892854f0dda77f68db29f494 SHA-256: a1383a5deb4358c57accfac49bddb79864d3eb46fbdbe324bba956382ca8293b
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses a password-protected-archive 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 0.9980

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/dbzfs-roblox-hack-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/free-hacking-script-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/vortex-premium-key-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-code-carte-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-roblox-accounts-and-passwords-in-roblox-shown-on-wikia_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/pokemon-go-free-and-pokeball-plus_GM1094591345.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/gun-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-hack-on-roblox-no-email-or-no-password_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-only_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/robux-hack-me_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_off00003196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3196 22624 bytes
SHA-256: fb1cbc4ec0375cae96017a2b4c3195c3acbfdadb4aa7b5cfa90bc59bc79f56a0
font_01_sfnt_off00006419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6419 18908 bytes
SHA-256: 078e9c9d0360c4e34926a579c7a0be7c7d215c13599b4e4610189af1856a655d

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