Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c2ec0b069d82bc0…

MALICIOUS

PDF

35.0 KB Created: 2021-06-25 12:07:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b83924561117ec052c5746555726da71 SHA-1: af51af00c5c3612b47dd005a22148dfd98c69e0e SHA-256: 1c2ec0b069d82bc0db7ae781fcde64f9c27a8443df0c891696e62af071b39911
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are hosted on educational domains but point to files promising game hacks and free currency for popular games like Roblox and Coin Master. The ML classifier and the PDF link farm heuristic strongly indicate malicious intent, likely to trick users into downloading malware or visiting phishing sites.

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-to-generate-free-robux-game-hack
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-get-free-robux-without-paying_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-spins-and-coins-for-coin-master_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdf
    • https://perpustakaan.man2kotaserang.sch.id/repository/roblox-kohls-admin-house-hack-script_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-1m-free-robux-everyday_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-free-exploit-no-virus_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/download-coin-master-hack-apk_GM406889139.pdf
    • https://perpustakaan.man2kotaserang.sch.id/repository/roblox-rc7-hack-scripts-lumber-tycoon_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/apps-that-give-you-free-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-servers-that-give-free-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-support_GM406889139.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/body-roblox_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-jump-hack-in-roblox_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-free-items-glitch_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-robux-https-robuxplanet-com-r_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id//repository/master-coins-free_GM406889139.pdf
    • https://perpustakaan.man2kotaserang.sch.id/repository/roblox-hack-on-robux_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-catalogs-on-roblox_GM431946152.pdf
    • http://perpustakaan.man2kotaserang.sch.id/repository/dll-files-roblox-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003185.bin
ade6cf2dea80a0ac05e968be3e0e840c6e801895a5c1534d823cbf9e49408d40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3185 22688 bytes
font_01_sfnt_off000063e6.bin
d7e9d9615b8a76b14b2c87bacef04cd90f47f1bddb773278a0aa8c1e5ee3d081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63E6 18984 bytes

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