Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f34ea70c6cb884…

MALICIOUS

PDF

35.3 KB Created: 2021-06-25 14:04:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9823236d5b3c08a7f4954b6a08eea932 SHA-1: aae5d88a396b448ead5c928d3eb7a26c453b72d2 SHA-256: 71f34ea70c6cb884aabf9c9df8d5621a19779b05bd85b805a3326c83c3d4a9b2
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/password-generator-roblox-hack-game-hack PDF link annotation
    • http://daskrimti-jabar.web.id/library/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-blogspot-free-spins_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/united-gaming-net-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/free-spins-coin-master-links-blogger_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/create-minecraft-server-free_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/pubg-uc-india_GM1330123889.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/rixty-free-robux_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library//repository/how-to-hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/roblox-skywars-mega-vip-hack_GM431946152.pdfIn PDF document text
    • http://daskrimti-jabar.web.id/library/repository/coin-master-free-spin-daily-link_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off0000327f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327F 22284 bytes
SHA-256: ed89f6686e4259f742146378ba83833e3b2df5a250b9282f65cec7872275358f
font_01_sfnt_off000063fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FC 19252 bytes
SHA-256: 75dca7291e5c21d0bb93473ac2a7ecd00045516e31b78a06e1b61553184602dc

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