Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c4d22eb1275602…

MALICIOUS

PDF

34.0 KB Created: 2021-06-28 04:38:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 85272fe90b080c0009f3a2eda9cbae1e SHA-1: 52c3fe47d20884e59711a4b66a962a9ac3e4be86 SHA-256: d7c4d22eb127560275d7c469bbd991107fbc3431b08998e193092fc68fc12eb8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are part of a link farm designed to appear as legitimate resources for popular games. The primary URL, http://netcdn.co/app/431946152/rbc-points-get-free-roblox-game-hack, suggests a lure for free in-game currency or hacks. The presence of a ML classifier flagging the PDF as malicious and the sheer volume of external links indicate a high likelihood of this document being used for phishing or to redirect users to potentially harmful sites.

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/rbc-points-get-free-roblox-game-hack
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-today_GM406889139.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-promo-code-2021_GM406889139.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-unlimited-spins-apk-free-download_GM406889139.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-easy-no-download_GM431946152.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/tiktok-viewer-free_GM835599320.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-rewards_GM406889139.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-today-new_GM406889139.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-blogger_GM406889139.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/how-to-make-clothes-on-roblox-for-free_GM431946152.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-with-inspect-element-2021_GM431946152.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/roblox-studio-free-robux_GM431946152.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/roblox-creepy-april-fools-hack_GM431946152.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/coin-master-hack-mod-game-download_GM406889139.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/minecraft-pe_GM479516143.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/roblox-hack-999999-robux-pc-2021_GM431946152.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/2021-free-spins-coin-master-link_GM406889139.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/how-to-be-naked-on-roblox-free_GM431946152.pdf
    • https://e-learning.manbangkalan.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-mobile_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000304e.bin
8b073d7ee4c01fe07c91ae730d74aa5a68a30887ad0a8e18713c8ef1e6520994		 pdf-font-stream PDF embedded font (sfnt) at offset 0x304E 21760 bytes
font_01_sfnt_off00006017.bin
ba878444a023c6590ee4c2a932ee3f002108bc3ce307fea99482c7a43b89435d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6017 19028 bytes

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