Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df6078d2a3c7516…

MALICIOUS

PDF

34.4 KB Created: 2021-06-28 19:22:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ff6dfeee32a65276733f31aafc6a0428 SHA-1: e38fd9372996a79673385b67696345d901098f12 SHA-256: 3df6078d2a3c751642f454ef9b5f5765b35b75c18f35037e4fe25bb91fe9261c
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which are presented as download opportunities for game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports a malicious intent to direct users to potentially harmful content. No scripts were extracted, but the document's structure and embedded URLs suggest a lure for users seeking unauthorized game advantages.

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/rosie-hacks-caillou
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-hack-mod-apk-2021_GM406889139.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-to-get-free-robux-on-computer-no-hack_GM431946152.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-robux-that-works-2021_GM431946152.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-do-you-get-free-robux-no-hack_GM431946152.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-to-make-a-minecraft-pe-server-for-free_GM479516143.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/roblox-cheats-for-operation-squoprion_GM431946152.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-to-hack-roblox-2021_GM431946152.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/pokemon-go-free-stardust_GM1094591345.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/free-robux-obby-2021_GM431946152.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-34-4-free-download_GM406889139.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/roblox-free-robux-generator_GM431946152.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-free-spins-link_GM406889139.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/hack-coin-master-spin-apk_GM406889139.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/where-can-i-get-free-spins-for-coin-master_GM406889139.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-link-spin_GM406889139.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-to-get-free-robux-2021-easy_GM431946152.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/hack-to-protect-village-on-coin-master_GM406889139.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/coin-master-tips_GM406889139.pdf
    • http://cpsad.adturekorea.co.kr/newboard/_upload/userfiles/files/how-to-get-free-unlimited-coins-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f4e.bin
5af25fcdad1f3dc2cf54a675d265833e6092ef9e979e9d455378ee7a38b98950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4E 22388 bytes
font_01_sfnt_off00006152.bin
93dd21c520d205e841ef6427be345fb2d5a05bae8d24e1c359b282247ca084a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6152 19084 bytes

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