Malicious PDF — malware analysis report

Static analysis result for SHA-256 065f33a5bc642f22…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 19:41:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 77bceda538e695a11d2c58f10ca75f56 SHA-1: 518aca7d1f514592a6641c0cdcb4eb26154b5662 SHA-256: 065f33a5bc642f22eea6b5699c4c921be083974398baabf8e9e243e66954502d
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.tw/app/835599320/free-tiktok-views-game-hack PDF link annotation
    • http://elibrary.perludem.org/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-card-collection-in-coin-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-stuff-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-gear-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/roblox-ninja-dojo-tycoon-cheats_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-roblox-accounts-youtube_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/obby-gives-you-free-robux-no-password-required-2021_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-roblox-accounts-with-life-time-obc_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-coins-in-phantom-forces-roblox_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-jailbreak-hack-download_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-zombie-strike-hack-script_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-cheat-tables_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-hack-roblox-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-actually-get-1-000-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-free-simulator_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-roblox-premium-for-free_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_off00003125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3125 22664 bytes
SHA-256: 546c62ef9b1555e3f143135b873d0fa501bf37bf93a8a990f18160d7d74efbf9
font_01_sfnt_off000063bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BB 18268 bytes
SHA-256: e9ea1c1fbd10584c8bc4d35f8f286488998bd71fad106c03ce2dc9d0be50044d

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