Malicious PDF — malware analysis report

Static analysis result for SHA-256 761bc16837f1356c…

MALICIOUS

PDF

34.8 KB Created: 2021-07-02 06:55:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bf750df9b0a57897f96e66aead3b68ef SHA-1: dc0cb966dedd7ea323f42b25f669266375288a84 SHA-256: 761bc16837f1356c840265241816a0c59d81a48bba9499d3b3b20ea099d545df
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a 'link farm' designed to direct users to pages offering 'free Roblox money' or hacks. The ML classifier strongly indicated maliciousness, and the presence of many external links suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious workflow, likely involving redirection to malicious websites.

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.co/app/431946152/how-do-i-get-free-roblox-money-game-hack
    • http://opac.akafarma-aceh.ac.id/repository/how-to-cheat-in-roblox-boxing-simulator_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/actual-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-jpg_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/hacks-de-pago-para-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-roblox-level-7-hack_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-hair-on-roblox-mobile_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-hack-free-robux-in-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-free-robux-hack-youtube_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-com-roblox_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-deals_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/code-for-robux-free-2021-4th-of-july_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-do-you-get-free-robux-works_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-france-roblox-flag_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/roblox-points-get-free-robux_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/coin-master-hack-xyz-download-free_GM406889139.pdf
    • http://opac.akafarma-aceh.ac.id/repository/robux-hack-no-human-verify-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/how-to-get-robux-using-cheat-engine-67_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/free-robux-apk-oct-18-2021_GM431946152.pdf
    • http://opac.akafarma-aceh.ac.id/repository/rhow-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f10.bin
a00e7ae9489991162d2805548a7141bf5296fa97e4dea2cdeeecf49382d514ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F10 22796 bytes
font_01_sfnt_off000061d5.bin
250972e9a401e0b6d086da92eade65f86356a63d50bf210d8edf172be256db62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61D5 19460 bytes

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