Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2320ace2d1f7394…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 12:24:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2496a5e8719c5e271398555bd8f46032 SHA-1: 949f76891c96a3719953def69d7d32c104b9bd1c SHA-256: f2320ace2d1f73949417409dd6c9f4ded0c5ab72d1294cc2107776c55bf4361c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, that all point to websites offering 'free Robux' or 'Coin Master spins'. The ML classifier strongly indicated maliciousness, and the presence of these links suggests a phishing or scam attempt designed to redirect users to potentially malicious sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/how-to-get-free-robux-on-roblox-com-game-hack
    • https://library.sman1berau.sch.id/repository/coinmasterfreespinlink_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-robux-android_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-ids-for-free-spins_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/free-spins-coin-master-no-survey_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/claim-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-code-for-free-spins_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-and-coin-links_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/codes-to-get-free-robux_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-heaven-free-spins-link_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/wizard-hacks_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/gun-hacks-for-roblox_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/how-to-hack-roblox-accounts-on-ipad-2021_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-minecraft-windows-10-for-free-with-java_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/coin-master-daily-rewards-link_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/blogspot-free-spins-coin-master_GM406889139.pdf
    • https://library.sman1berau.sch.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • https://library.sman1berau.sch.id/repository/minecraft-free-trial_GM479516143.pdf
    • https://library.sman1berau.sch.id/repository/update-coin-master-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003292.bin
7d1b3767b1dcb65c6afb25ebf13bf1c53d1f20f634b487c2f926cdd1d1f62300		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3292 22848 bytes
font_01_sfnt_off00006562.bin
3c8e0b1bf9fb3b6c3da03227b45704df4450a6c61e3d31a0188e77c31b1b908f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6562 19132 bytes

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