Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc3045f17d024db…

MALICIOUS

PDF

35.0 KB Created: 2021-07-01 14:07:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3e6bc5afc0d175602282079d2247cf9a SHA-1: bc1f60346daa8f318db424d9bfbcbb5f55d293fd SHA-256: 6fc3045f17d024dbd4c28591ab3a9eb37f9707b3c92ff23fbb727b68e058248b
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external resources, many of which are SEO-optimized pages promising free Robux or game hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' lure further supports the phishing or scam attempt.

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-2021-august-codes-game-hack
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/free-robux-generater-free_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/military-dave-roblox-free-robux_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/free-roblox-accounts-2021-with-robux-august-2021_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/como-tener-hacks-para-roblox_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/free-unlimited-robux-generator-no-human-verification_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/free-gamepass-in-any-games-roblox_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/can-free-models-steal-your-password-roblox_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/how-do-you-get-free-robux-ipad_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/roblox-free-robux-no-verification_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/roblox-speed-client-hack-2021_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/roblox-cheat-engine-online_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/best-sword-in-fight-the-monster-roblox-cheat_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/free-trials-for-explots-of-roblox_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/codes-to-get-free-robux_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/pastebin-robux-2021-hack_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/roblox-free-set_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/free-spins-coins-coin-master_GM406889139.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/http-bloxy-site-free-robux_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/hack-codes-for-roblox-rb-wolrd-2_GM431946152.pdf
    • http://perpustakaan.ft.unismabekasi.ac.id/katalog-buku/repository/free-roblox-accessories_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003296.bin
bb7d506115b9157e01dccbf7353e73fa36f3e7dfc725eb6da681df3bc4376955		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3296 21708 bytes
font_01_sfnt_off0000625b.bin
7e9be4bd9153272be326df0305e2bc838f3293fd908170207ffb656726653104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 19396 bytes

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