Malicious PDF — malware analysis report

Static analysis result for SHA-256 74403dbf7200621e…

MALICIOUS

PDF

45.4 KB Created: 2021-06-09 06:20:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 6f0af887f9828262067fb0961e73fa27 SHA-1: 6c2d47a2a850477a589951fc8de8e3fd5c1eba1e SHA-256: 74403dbf7200621eed70f0bfa4e8b7297c34b7adfc802743659318b578bef9e1
102 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or a method to distribute further malicious content. The presence of a 'download button' heuristic and the ML classifier's high confidence further support a malicious intent, likely to trick users into downloading unwanted or harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/robux-hack-zero-game-hack PDF link annotation
    • http://dygmotors.com.py/images/hacks-for-legends-of-speed-roblox-download-pc_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://dygmotors.com.py/images/compte-roblox-hack_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/roblox-hack-tool-robux-and-tickets-download_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-get-minecraft-for-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-pubg-uc-carding_GM1330123889.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-facebook-free-spins_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • http://dygmotors.com.py/images/coin-master-hacks-and-cheats_GM406889139.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://dygmotors.com.py/images/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://dygmotors.com.py/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51C8 26256 bytes
SHA-256: a8b36e601f4579b64b0e96017e19b588f786b9dffa85e43f3ec4b6efc84f5101
font_01_sfnt_off00008ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC2 18340 bytes
SHA-256: 75a6bcbbf9d167f44a7b6d32048955e677e1ad0ad15df193808daa7f2ca75cda

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