Malicious PDF — malware analysis report

Static analysis result for SHA-256 9736f5a30ff72d8a…

MALICIOUS

PDF

45.5 KB Created: 2021-06-11 08:58:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b55a4732a451684075b4448f0f34ed50 SHA-1: 10cf74be7d25b52f48212313aff91404f772544d SHA-256: 9736f5a30ff72d8a4ea3a00cca9f47f6054b5e48ec5c8eaa2c8be8cc03db6852
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 0.9864

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.
  • 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 https://netcdn.tw/app/431946152/free-roblox-accounts-2021-game-hack PDF link annotation
    • http://library.fisip.upnvj.ac.id/repository/roblox-thanos-shirt-free_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/is-minecraft-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/roblox-hack-mo_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-coin-master-gift-link_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-hack-kat-roblox_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-password-needed_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/robux-hack-download-google-chrome_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/free-robux-generator-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://library.fisip.upnvj.ac.id/repository/how-to-get-free-robux-hack-2021_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_off000051c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51C1 26060 bytes
SHA-256: e1378858dc41afdd1d98ce18affdc5294df1e33afb2598404ea271181677a2e5
font_01_sfnt_off00008e40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E40 18596 bytes
SHA-256: 22cfe7717cbde525e358518c643d16773849ea10ba84c2e1869734c310f91593

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