Malicious PDF — malware analysis report

Static analysis result for SHA-256 77bd70d0610c8c25…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 17:56:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9c1510e28ca0ab602c1980cc00275eba SHA-1: 1397f08f8f173ea037628396ff5e927327560146 SHA-256: 77bd70d0610c8c2540a79d07be6a74b3277b3df529961d274a01084c54ce973a
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a prominent link to 'http://netcdn.tw/app/431946152/roblox-account-hacker-tool-game-hack', suggesting a phishing or scam attempt. The document body and extracted URLs indicate a lure for game-related hacks and tools, likely to trick users into downloading malware or providing personal information. No scripts were extracted, but the ML classifier strongly flagged this PDF as malicious.

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.tw/app/431946152/roblox-account-hacker-tool-game-hack PDF link annotation
    • https://lib.btkljogja.or.id/repository/roblox-hats-for-free_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/hype-dance-roblox-free_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/natural-disasters-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-maker-hack_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-hacking-website_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/cheat-for-roblox-super-speed-and-jump-hack_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-generator-no-survey-or-human-verification-2021-pc_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/pokemon-go-free-level-40-account_GM1094591345.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-headphones-free_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-pubg-uc-hack_GM1330123889.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/get-400-robux-for-free_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/archery-master-3d-coins-hack_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30F5 22504 bytes
SHA-256: 85b291ac1788df8ac44a177441e50a1bfad7d47caf64f499e6a71be7e9ee851d
font_01_sfnt_off00006324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6324 18900 bytes
SHA-256: 5e227fc62697cb3269bdd3a592c8ebb7199d78e91586905988432c1fb38acbe4

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