Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1e96bbfc3087639…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 18:01:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 442a191429e2f80943321f99a3bec0c7 SHA-1: 9105acf1b4f2550099454901a81730dc253b0945 SHA-256: d1e96bbfc30876398b51321f2e8a823bb81b2455bfe6fcef5d02ede23d10f3f4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to 'netcdn.tw', which is flagged as a redirector for game hacks and free currency lures. The ML classifier strongly indicates maliciousness, and the presence of embedded URLs suggests an attempt to direct the user to a malicious site. No scripts were extracted, but the overall pattern points to a phishing or scam attempt designed to trick users into visiting a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • 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.
  • 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/431946152/comment-avoir-des-robux-gratuit-2021-sans-hack-game-hack PDF link annotation
    • http://opac.disarpus.surakarta.go.id/repository/roblox-hacks-for-phantom-forces_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/woman-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/login-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-500-spins-link_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-roblox-gift-card-codes-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-roblox-toys_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-jailbreak-speed-hack-check-cashed_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/can-i-hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-account-for-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-veil-hack_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-holiday-crown-on-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/beta-warships-roblox-hack_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-link_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/comptes-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-coins-on-coin-master_GM406889139.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_off00002b99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B99 22300 bytes
SHA-256: 664ff6dbfcea3e6cf6c3dc2c4ae16125a02f1a3c0085a043b40e08f4b5edeebc
font_01_sfnt_off00005d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D42 19892 bytes
SHA-256: bdae924df3df8682d7a61ad9118155b4ef377b54b37e610832006c41ea0e0e71

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