Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db394b4511f05d5…

MALICIOUS

PDF

36.2 KB Created: 2021-06-29 22:26:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d7916bd73a7ff60d6969633264268a1d SHA-1: cf7f8ca15277279e681271b240e4931f8cec8c39 SHA-256: 2db394b4511f05d5b42435faebceca040bf802bf8a249438954af53ab0dc0497
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document contains numerous embedded links, many of which are related to "Roblox hacks" and "free Robux", suggesting a lure for users seeking in-game advantages. The presence of a direct download URL and a large number of external links indicates a potential distribution point for malware or a scam. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent.

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/free-robux-tool-download-game-hack PDF link annotation
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/can-people-actually-hack-into-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/jump-faster-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-be-crushed-by-a-speeding-wall-hack-script_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-get-free-robux-on-roblox-100-works_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/can-you-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-robu-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/how-to-get-free-tiktok-fans-without-human-verification_GM835599320.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/get-free-robux-without-sighning-in_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/peple-hacking-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-pets-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/nombres-de-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/comment-crer-un-hack-pour-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-hack-download-free-pc_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-headset-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.mamduh.my.id/__statics/gudangsoal/files/roblox-hack-stand-user_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_off00003573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3573 22772 bytes
SHA-256: 2eac2e6f2b0b3299ec90c6dac716f24b49105d71c2218d2d5609f70ad061b025
font_01_sfnt_off000067ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67EC 19296 bytes
SHA-256: 59ff6553af9684bee3daae95b6cc6100868693c9121e6d9f2b8c166a4edfff9f

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