Malicious PDF — malware analysis report

Static analysis result for SHA-256 8771272a7e7dac2d…

MALICIOUS

PDF

35.4 KB Created: 2021-06-26 10:24:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 361de2eb053a27166ff95ff844e8e7ee SHA-1: d0a58e5b48a028e62c253e911227875d8b934195 SHA-256: 8771272a7e7dac2d3db16c78e4e7fd1b726d0d6c1560f4ee37624be86e547b53
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are presented as download opportunities for game cheats and hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous SEO-optimized links suggests a link farm designed to distribute malware or lead users to phishing sites. No scripts were extracted from this sample.

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-hack-roblox-weight-lifting-sim-game-hack
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-robux-no-human-verification-generator_GM431946152.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-daily-rewards_GM406889139.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-hack-coin-master_GM406889139.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-no-survey_GM406889139.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/john-doe-roblox-hacker_GM431946152.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-2021-haktuts_GM406889139.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/counter-blox-roblox-offensive-hack-download-free_GM431946152.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/free-roblox-executor-no-key_GM431946152.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/hacking-apps-for-roblox_GM431946152.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-hack-apk-33-download_GM406889139.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-link-today_GM406889139.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdf
    • https://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-faces-on-roblox_GM431946152.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-free-trial_GM479516143.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-android-2021_GM431946152.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/promo-codes-to-get-free-robux_GM431946152.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/roblox-source_GM431946152.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/how-to-get-a-free-minecraft-account_GM479516143.pdf
    • http://sman1negara.sch.id/new/public/ckfinder/userfiles/files/tower-of-hell-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_off000031f6.bin
f6f4e4a6dc67fc388fe0bb30c24d278663d2aad3e5095308d691ff94e71c6ccd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31F6 22504 bytes
font_01_sfnt_off000063be.bin
5e04a19adfed13c130e78d74324cd93f867813e213d481ba261180a53dc478ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BE 19668 bytes

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