Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a46cd60e9117ee…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 06:43:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7ac66fc06d40f3f4ed6d9bfe1c31b141 SHA-1: ab1f437e0b82698f19108859513b458f98259301 SHA-256: e2a46cd60e9117eeed1282225d8c0afaf9074a47b255cc55495b1bfddabcab0c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external websites, many of which are structured as PDF files hosted on what appears to be a link farm. The document body and extracted URLs suggest a lure related to game cheats and currency, such as 'Robux' for Roblox. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic further supports a malicious intent to redirect users to potentially harmful content.

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/robux-prices-game-hack
    • http://stmb-multismart.ac.id/perpustakaan/repository/are-the-free-robux-fake_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-heaven-daily-free-spins_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-game-free-spin-download_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-no-verification-or-survey_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/ways-to-get-free-robux_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/rbx-hut_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/uprobuxcom-free-robux_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/god-mode-hacks-for-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-clothing-on-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-games_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-tuxedo-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/como-activar-hacks-en-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/funbloxxyz-free-robux_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/80-free-spins-coin-master_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-free-robux-website_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-glitch-free-clothes-on-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/make-your-own-minecraft-server-free_GM479516143.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-robux-fast_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-robux-hack-generator-no-survey-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000304d.bin
180793bc7dda1c352ec103a67fcaff3b655713eaf7948a5c2fd9aeb3f939cb85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x304D 22696 bytes
font_01_sfnt_off00006325.bin
917b2b595c85e899e08b6a40e7434d48f59ea0235caebc632e03070b6eb7ba4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6325 18824 bytes

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