Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d14da23c860914…

MALICIOUS

PDF

48.1 KB Created: 2021-06-03 06:38:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3bc9a7327f53370f0608bc0cfe33231b SHA-1: 1e9474390952b29c31a9223b599293cb25779b1a SHA-256: d2d14da23c8609147285697482cb619a69415a60e4cebf60eddf1ce814e75e0b
102 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, suggesting a deceptive purpose. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a 'download button' lure further supports the malicious intent, likely to redirect users to malicious sites or download unwanted content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/406889139/get-free-food-in-coin-master-game-hack
    • http://lib.teknik.unimal.ac.id//repository/www-roblox-com-robux-free_GM431946152.pdf
    • http://lib.teknik.unimal.ac.id/repository/what-is-exploiting-in-roblox_GM431946152.pdf
    • http://lib.teknik.unimal.ac.id//repository/legit-coin-master-hack-no-human-verification_GM406889139.pdf
    • http://lib.teknik.unimal.ac.id/repository/what-is-coin-master-app_GM406889139.pdf
    • http://lib.teknik.unimal.ac.id//repository/coin-master-pc-hack-download_GM406889139.pdf
    • http://lib.teknik.unimal.ac.id//repository/pokemon-go-free-2021_GM1094591345.pdf
    • http://lib.teknik.unimal.ac.id//repository/free-robux-apps-that-work_GM431946152.pdf
    • http://lib.teknik.unimal.ac.id/repository/how-many-tiktok-free-folowers-make_GM835599320.pdf
    • http://lib.teknik.unimal.ac.id//repository/free-whatsapp-tik-tok-status-download_GM835599320.pdf
    • http://lib.teknik.unimal.ac.id/repository/coin-master-daily-spins-and-coins_GM406889139.pdf
    • http://lib.teknik.unimal.ac.id/repository/robux-free-promo-codes_GM431946152.pdf
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdf
    • http://lib.teknik.unimal.ac.id//repository/coin-master-working-hack_GM406889139.pdf
    • http://lib.teknik.unimal.ac.id/repository/robux-fun-hack_GM431946152.pdf
    • http://lib.teknik.unimal.ac.id//repository/how-do-you-get-free-coins-in-coin-master_GM406889139.pdf
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hack-online-generator-without-human-verification_GM406889139.pdf
    • http://lib.teknik.unimal.ac.id//repository/easy-way-to-get-free-robux_GM431946152.pdf
    • http://lib.teknik.unimal.ac.id//repository/how-to-play-roblox-for-free_GM431946152.pdf
    • http://lib.teknik.unimal.ac.id//repository/funbloxxyz-free-robux_GM431946152.pdf
    • http://lib.teknik.unimal.ac.id//repository/roblox-hacks-2021_GM431946152.pdf
    • https://coinmasterspinandcoin.com
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005233.bin
bfbe2a1d47ce9e63baf9ad775b9064656f0bc82ffd9c74c26edc0a7c655a31ea		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5233 27492 bytes
font_01_sfnt_off000090b9.bin
30dce2b9c1950da345d7fed8f00c38887adfa2f2ddecc31775af2315e819ac37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B9 2840 bytes
font_02_sfnt_off00009a6c.bin
9e8203a117569d62088e0d60748e14aeb3e41c3201478a2ae4f054b44a03d8f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6C 17884 bytes

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