Malicious PDF — malware analysis report

Static analysis result for SHA-256 c69bb0b2e68aca29…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 11:40:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 45f6ca0053b1bff52337e94036789992 SHA-1: 18594a22f6238aa58859795e07edf3ba454abe4b SHA-256: c69bb0b2e68aca29e9acac1f00680ce65c5df65020c1d24cc972898afacc0e27
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are SEO-optimized and promise free in-game items or hacks for popular games like Roblox and Coin Master. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic further supports a lure-based attack. The document's content and structure suggest it's designed to trick users into visiting these malicious URLs, likely to download further malware or engage in phishing.

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.tw/app/406889139/hack-coin-master-for-free-game-hack
    • http://stmb-multismart.ac.id/perpustakaan/repository/links-for-free-items-in-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-free-robux-2021-xbox-one_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-free-event-items_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-2021-no-human-verification-pc_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/get-free-robux-info_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-get-tiktok-famous-free_GM835599320.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-groups-that-give-out-free-robux_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-games-on-roblox-2021_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-de-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-tell-if-you-have-been-hacked-on-roblox_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/real-robux-hack-no-survey-2021-febuary_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/make-free-robux_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/roblox-hack-move-2021_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-hack-roblox-to-get-free-items_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-no-verification-2021-ios_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-ad_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/how-to-hack-1-robux-into-100-rubux_GM431946152.pdf
    • http://stmb-multismart.ac.id/perpustakaan/repository/free-robux-no-gift-card_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003106.bin
ed6bcfc20a50391f6810b2ce43e056a797d80cc2098c73c8901f5111ed9e0411		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3106 23240 bytes
font_01_sfnt_off0000658b.bin
be72a1914a99b846651b156c672e0768d1f742f579973333786d0ab12deac364		 pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 18168 bytes

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