Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d8bb58de50c8ea3…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 20:30:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ea1bbccde33462a6793aa70394e9bedd SHA-1: c284fbcdf6129ec057b8460b8a56771d2934f80c SHA-256: 1d8bb58de50c8ea379ee86b43321dd3730c835d991bb9b7a392fa65708a8ae24
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'game hacks' and 'free currency' to entice users. It contains multiple embedded URLs pointing to sites offering such content, which are likely to host malicious payloads or phishing pages. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a potential multi-stage attack where the user is instructed to open a password-protected archive, a common tactic to bypass security scans.

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.online/app/431946152/best-roblox-hacks-game-hack PDF link annotation
    • http://library.futureuniversity.com/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-spins-coin-master-without-completing-offers_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-robux-pins_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/instantrobux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://library.futureuniversity.com/repository/minecraft-bedrock-download_GM479516143.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_off00004f6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F6A 27676 bytes
SHA-256: ba78860c9ed205b02d774526adc0fa92d04c0fb202b51d4a879161b313d4e40a
font_01_sfnt_off00008e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E9B 18284 bytes
SHA-256: 94dd9c95e592a650c73b90ca092c2767a8462919e19feedd0474aea1e75e19d3

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