Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ef56f80ca65cff9…

MALICIOUS

PDF

51.4 KB Created: 2021-06-13 16:21:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 58fb4e84c5e4a4689ef87874de7a2049 SHA-1: 71b9a72fe1af9762ee5966b4e1339b7b1027dedf SHA-256: 0ef56f80ca65cff901590989c28471ff0911ea18627f8774c0e07cb8d38bd7f0
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links and a document body that promotes 'free Robux' and 'coin master hack' lures, aiming to trick users into visiting malicious sites. The ML classifier strongly flagged this PDF as malicious, and the presence of a mass external PDF link farm further indicates a malicious intent to distribute harmful content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/free-robux-codes-no-verification-2021-game-hack
    • https://lib.unitri.ac.id//repository/cmaster-club-coin-master-hack_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/free-roblox-app_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/coin-master-cheat-free_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/how-to-get-free-airpods-tiktok_GM835599320.pdf
    • https://lib.unitri.ac.id//repository/coin-master-free-coins-link_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/free-robux-card-codes_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/roblox-free-wings_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/free-spin-link-coin-master-today_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/easy-coin-master-hack-without-verification_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/how-do-you-download-minecraft-for-free_GM479516143.pdf
    • https://lib.unitri.ac.id/repository/free-spin-app-coin-master_GM406889139.pdf
    • https://lib.unitri.ac.id//repository/free-coins-coin-master-blog_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/lazy-blocks-com-free-robux_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/cheat-engine-speed-hack-roblox_GM431946152.pdf
    • https://lib.unitri.ac.id//repository/minecraft-hacked-client_GM479516143.pdf
    • https://lib.unitri.ac.id//repository/free-money-links-coin-master_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/roblox-cheats-mobile_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/how-to-hack-atms-in-liberty-county-roblox_GM431946152.pdf
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-twitter_GM406889139.pdf
    • https://lib.unitri.ac.id/repository/can-you-get-minecraft-for-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051af.bin
6e0d70b908b752c05ca27d1365bef9b25116278c834df623cb333eba3d1c9652		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AF 30524 bytes
font_01_sfnt_off00009666.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9666 5696 bytes
font_02_sfnt_off0000a378.bin
db1e34f64d78c47646929d75ef8e7d82dfccacc985d29653851fea35b3c0bf96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA378 19176 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.