Malicious PDF — malware analysis report

Static analysis result for SHA-256 6528625585ee1332…

MALICIOUS

PDF

43.4 KB Created: 2021-05-16 13:00:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ed63bc1b3bc9030969ee2a5f9782ab0b SHA-1: 87b6dea5700a1c3a2c869257319464e9f6a91f06 SHA-256: 6528625585ee1332f7f2bcc752a53ede236af0da7a6445fa26053bcb54cb1e80
102 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded URLs, many of which are structured as SEO-optimized links pointing to sites offering game cheats and free currency. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly suggests maliciousness. The document likely serves as a lure to redirect users to potentially malicious websites or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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.xyz/app/406889139/daily-coin-master-free-spin-link-game-hack
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/free-robux-hack-2021_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/free-robux-without-downloading-apps_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/mc-hacks_GM479516143.pdf
    • https://encounternepal.com/userfiles/files/master-free-spin-and-coin-link_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/free-coin-and-spin-link_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-website_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/free-robux-master_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/robux-come_GM431946152.pdf
    • https://encounternepal.com/userfiles/files/coin-master-daily-free-spins-link-download_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/coin-master-free-spin-daily-bonus_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/haktuts-coin-master_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/coin-master-free-chest-link_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/coin-master-daily-free-spins-and-coins-2021_GM406889139.pdf
    • https://encounternepal.com/userfiles/files/minecraft-hacked-client-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004818.bin
222b9a98c7e010aa4a7cc498089d8dadc9370b24773d514deddd022dd4578c3e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4818 27728 bytes
font_01_sfnt_off000086ac.bin
0e8ff706f766ebeac8fd51df3b46864e48e50accc558ba14dc70aa8347bf43ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86AC 18476 bytes

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