Malicious PDF — malware analysis report

Static analysis result for SHA-256 da70f9be2a6de5ce…

MALICIOUS

PDF

35.6 KB Created: 2021-06-25 15:42:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7d32961036992a42d5b848eeba8023c2 SHA-1: a57c98a1984a0b10653ad130ea8ed2590533c3d4 SHA-256: da70f9be2a6de5ce86e1db93a5d0b67529e153b10ed200e733731943bf98e3d3
122 Risk Score

Malware Insights

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

The PDF document uses a lure related to game hacks for Roblox, directing users to external URLs that likely host malicious payloads. The presence of a "password-protected archive handoff" heuristic suggests a multi-stage infection process where the user is prompted to decrypt a downloaded file. The ML classifier strongly indicates maliciousness.

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/roblox-hack-download-2021-jailbreak-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/flood-escape-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/como-tener-anti-gravedad-en-roblox-hack-check-cashed_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-robux-generator-http-freerobuxgenerator-xyz_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-tshirts_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-long-good-roblox-names_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-hack-wallhack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-xbox-one-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-draw-2-anime_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-someone-password-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-coins-coin-master-today_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/dev-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/huskybuckscom-free-robux_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_off00003150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3150 22528 bytes
SHA-256: 1ac1e013ec86512811923288a9ab9804403226aacd3c722e83760d7d2a29efb0
font_01_sfnt_off0000639f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639F 19852 bytes
SHA-256: f0937c6108be14b1a81c1363b6d333467518764d5bef298c147c1e411b52fa0b

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