Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8bdbd8e4b1d5d77…

MALICIOUS

PDF

42.5 KB Created: 2021-05-19 16:15:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8eaf7933a5a2fd0cae93579e7bcd10e2 SHA-1: 5fe92706eaa5f775f89d7a149ea33c54be8a30a3 SHA-256: e8bdbd8e4b1d5d77c5b5169012fd7f23bcaa5bd129f2fdf549579dc78e1fc440
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, forming a link farm, that direct users to websites offering game hacks and cheats. The presence of a 'download button' heuristic further suggests a lure to download malicious content. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/roblox-install-free-game-hack
    • http://www.das-kinderzimmer.net/images/coin-master-hack-without-human-verification-2021_GM406889139.pdf
    • http://www.das-kinderzimmer.net/images/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.das-kinderzimmer.net/images/roblox-account-hacker-tool_GM431946152.pdf
    • http://www.das-kinderzimmer.net/images/free-robux-no-verify-2021_GM431946152.pdf
    • http://www.das-kinderzimmer.net/images/free-robux-gift-card-codes_GM431946152.pdf
    • http://www.das-kinderzimmer.net/images/when-pokemon-go-free-will_GM1094591345.pdf
    • http://www.das-kinderzimmer.net/images/haktuts-coin-master-free-spins_GM406889139.pdf
    • http://www.das-kinderzimmer.net/images/where-to-get-free-robux_GM431946152.pdf
    • http://www.das-kinderzimmer.net/images/how-to-get-free-robux-without-offers_GM431946152.pdf
    • http://www.das-kinderzimmer.net/images/toolbox-for-minecraft-pe-ios_GM479516143.pdf
    • http://www.das-kinderzimmer.net/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://www.das-kinderzimmer.net/images/free-robux-no-apps_GM431946152.pdf
    • http://www.das-kinderzimmer.net/images/minecraft-bedrock-download_GM479516143.pdf
    • http://www.das-kinderzimmer.net/images/master-coin-free-link_GM406889139.pdf
    • http://www.das-kinderzimmer.net/images/coin-master-hack-pro_GM406889139.pdf
    • http://www.das-kinderzimmer.net/images/free-robux-hack-no-verification_GM431946152.pdf
    • http://www.das-kinderzimmer.net/images/mine-minecraft-games-for-free_GM479516143.pdf
    • http://www.das-kinderzimmer.net/images/roblox-adopt-me-free-pets_GM431946152.pdf
    • http://www.das-kinderzimmer.net/images/free-spins-coin-master-links-2021_GM406889139.pdf
    • http://www.das-kinderzimmer.net/images/free-coin-master-spins-blog_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004803.bin
27a0260ee96d1ed0fb5b08decb11aa53b94f16d0d5f3afecfc7b77bd2afb8a16		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4803 25824 bytes
font_01_sfnt_off000083bb.bin
3c3a3b9ea50be1288d4e90d28d6823d5d0e7fce454efe1523ba787caa6fa0fc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83BB 18280 bytes

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