Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac37ab2a68d6929…

MALICIOUS

PDF

46.7 KB Created: 2021-05-17 23:10:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3653d351e951a8cbd822901338851cb3 SHA-1: e70bbe7a3dfffa124e656df29930647e6ba853ed SHA-256: eac37ab2a68d6929a160ee84877871ae34fabc6a972298c66b066bbe3a189df3
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 structured as SEO-optimized PDF gateways for game-related cheats and hacks. The document body and extracted URLs strongly suggest a lure for users seeking free in-game currency, which is a common tactic for phishing or malware distribution. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/how-to-get-free-robux-2021-no-human-verification-game-hack
    • https://ceranique.nl/images/what-games-on-roblox-give-you-free-robux_GM431946152.pdf
    • https://ceranique.nl/images/coin-master-free-spins-today-daily-links_GM406889139.pdf
    • https://ceranique.nl/images/toolbox-for-minecraft-ios_GM479516143.pdf
    • https://ceranique.nl/images/free-robux-2021-no-human-verification_GM431946152.pdf
    • https://ceranique.nl/images/free-robux-codes-no-human-verification_GM431946152.pdf
    • https://ceranique.nl/images/free-robux-hacks-no-verification_GM431946152.pdf
    • https://ceranique.nl/images/coin-master-daily-free-spins-link-2021_GM406889139.pdf
    • https://ceranique.nl/images/coin-master-attack-hack_GM406889139.pdf
    • https://ceranique.nl/images/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • https://ceranique.nl/images/robux-no-survey_GM431946152.pdf
    • https://ceranique.nl/images/coin-master-mod-apk-free-download-for-android_GM406889139.pdf
    • https://ceranique.nl/images/easy-ways-to-get-free-robux_GM431946152.pdf
    • https://ceranique.nl/images/how-do-you-get-free-robux-2021_GM431946152.pdf
    • https://ceranique.nl/images/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://ceranique.nl/images/kachifpro_GM406889139.pdf
    • https://ceranique.nl/images/free-robux-hack-no-human-verification-or-survey_GM431946152.pdf
    • https://ceranique.nl/images/free-robux-net_GM431946152.pdf
    • https://ceranique.nl/images/roblox-army-free-robux_GM431946152.pdf
    • https://ceranique.nl/images/hack-a-game_GM431946152.pdf
    • https://ceranique.nl/images/minecraft-bedrock-edition-free_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049dc.bin
a7c97f0104eaad818b6e9c63e4d9545e3d70ccdfe474c38e4fb446e2645d90c6
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49DC 25016 bytes
font_01_sfnt_off00008391.bin
567b12258042b29dc9213b211e31194e9e0e96b59e87b0fcdaf4835989646dee
pdf-font-stream PDF embedded font (sfnt) at offset 0x8391 3988 bytes
font_02_sfnt_off000090b0.bin
dfc7ca414cfca4f80301273998e01ceb4bfd22e3de883fcbe9d6a0102e8d41a4
pdf-font-stream PDF embedded font (sfnt) at offset 0x90B0 19428 bytes