Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b37a35d55b5c24e…

MALICIOUS

PDF

50.5 KB Created: 2021-05-11 17:10:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 13e98481632497a5f1f945fb21203ecd SHA-1: c09ff45fe0e20ef38efd80705ac763d7fc91e318 SHA-256: 1b37a35d55b5c24e0e53f6bec10ccf57820c4077d0feb96bed499be6c8142458
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of external links, many of which appear to be part of an SEO link farm. The primary external URL, https://netcdn.xyz/app/431946152/what-do-roblox-points-do-game-hack, suggests a lure for game-related cheats or hacks. The presence of a "download button" heuristic further supports the idea that the document is designed to trick users into navigating to these external resources, which could host malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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/431946152/what-do-roblox-points-do-game-hack
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/www-rbxhut-com_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-apk-mod-hack-download_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-link-today_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-robux-no-anti-bot-verification_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-promo-codes-for-coin-master_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-robux-no-verification-no-download-2021_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/robux-com-roblox_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/hack-spin-coin-master_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/minecraft-pe-apk-download_GM479516143.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/roblox-cp_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-apk_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/heroes-online-roblox_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/free-coin-master-spins-without-human-verification_GM406889139.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/minecraft-free-online_GM479516143.pdf
    • https://www.elearning.ma-alkhairiyah.sch.id/__statics/gudangsoal/files/how-many-levels-does-coin-master-have_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004f2f.bin
ff444a334501dda3e2f6f2a5333263c37554aa52c41e85e83160c777ddd50429		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F2F 37312 bytes
font_01_sfnt_off0000a1d7.bin
bcbace7f2968187c9b0e7948c76ec4c5d121751191c9fcebe9b281b5414d3343		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA1D7 18920 bytes

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