Malicious PDF — malware analysis report

Static analysis result for SHA-256 67dddcb91796bb51…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 02:04:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9b1012962d3dba33e6b18d6d6e3f7208 SHA-1: df07807997522186957de19945e519298055cbb1 SHA-256: 67dddcb91796bb5185d61067dc5aa0f2e020e27dc0608a579d011b0c8c979388
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that explicitly promises ways to 'hack' game accounts and download cheats. The presence of a "PDF_SEO_LINK_FARM" heuristic indicates a large number of external links, many of which are likely malicious or lead to malicious content. The ML classifier also strongly flagged this PDF as malicious. The primary IOC is the URL http://netcdn.tw/app/431946152/como-hackear-cuentas-de-roblox-de-tu-amigo-a-game-hack, which is directly referenced in the document body and heuristics.

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/431946152/como-hackear-cuentas-de-roblox-de-tu-amigo-a-game-hack
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/minecraft-free-download-ipad_GM479516143.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/pokemon-go-best-free-outfits_GM1094591345.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-hacking-2021-jailbreak-roblox-100-sure_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/cm-free-spin-link-today_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/roblox-cheat-engine-trainers_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-coins-coin-master-link-today_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/roblox-thanos-skin-free_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/coin-master-tiradas-gratis_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/admin-roblox-hack-script_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/minecraft-for-free-on-phone_GM479516143.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/free-robux-generator-for-kids_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/ash-greninja-free-shopping-in-roblox-on-roblox-shopping_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/como-hackear-cuentas-de-roblox-con-robux_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/coin-master-32-hack-apk-download_GM406889139.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/roblox-hack-week_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/login-robux_GM431946152.pdf
    • https://stikes-alinsyirah.ac.id/perpustakaan/repository/this-obby-gives-you-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f63.bin
fa1b7de32d8805bfb44ed01b611e48c2d6f038d73ebb54388681def72244c699		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F63 22608 bytes
font_01_sfnt_off000061c4.bin
0d2bb09ba9ef0ed48731b6bc67e72cddf801e95b90e6a0589d0dd0943aec8715		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61C4 19264 bytes

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