Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec8d177ad379f78…

MALICIOUS

PDF

34.5 KB Created: 2021-06-25 21:27:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: db5ef8b6164ba24250420c6572a1279f SHA-1: e652a59efe5f9135e8903bf59290a98bd349d73b SHA-256: fec8d177ad379f783f92b13911ccd63b90af89ec26f2e486c72aa7cbd7d491cf
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, primarily related to game cheats and in-game currency, suggesting a phishing or malware distribution lure. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a visual download button heuristic further supports a malicious intent. While no scripts were explicitly extracted, the document's structure and content indicate it is designed to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/cheat-codes-for-bounce-roblox-game-hack PDF link annotation
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-credit-card_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/earn-robux-today_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/descargar-hack-roblox-funcional_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/mcpe-master-hack-coin-apk_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/youyube-how-to-get-free-robux-that-working_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/money-cheats-in-roblox-bloxburb-beta_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-prestonplayz-roblox-account_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/cheat-codes-for-vehicle-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-hack-download-pc_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/tiktok-comments-free_GM835599320.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/hack-para-mocap-dancing-vip-gratis-roblox_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/roblox-cheat-discord_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_off00002ff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF8 22256 bytes
SHA-256: ade9c146ed1da8dcad0b0b6e0c7d786f7776f79a53e9ef401cbaa474b9ab1670
font_01_sfnt_off0000612a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612A 19236 bytes
SHA-256: b208369964c968a49f5dfadaf436ca3d155821062b506527fed6744079076906

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