Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3fb6d5046c7451d…

MALICIOUS

PDF

35.9 KB Created: 2021-05-23 23:29:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4099a46a928976dabb8a9619adec7255 SHA-1: 93a4012d2ab13447e64438d6c9585f5989bf5129 SHA-256: b3fb6d5046c7451dec8d5f0054006ba443541c8f6610e3c6f2b37027beded883
82 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a primary external URI pointing to a site offering 'free Minecraft printables' and a 'game hack', which is a common lure for malware distribution. The heuristic 'SE_REMOTE_SUPPORT_LURE' suggests the document may also instruct users to install remote support tools, further indicating a malicious intent to compromise the user's system. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 4

  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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/479516143/free-minecraft-printables-game-hack
    • http://svadba-moda.kg/images/how-to-change-your-username-in-roblox-for-free_GM431946152.pdf
    • http://svadba-moda.kg/images/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://svadba-moda.kg/images/robux-free-c_GM431946152.pdf
    • http://svadba-moda.kg/images/roblox-robux-hack_GM431946152.pdf
    • http://svadba-moda.kg/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://www.freenom.comHey
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000341e.bin
fc861688957cd3871f59e8c9d14cfb1a518b0859e5d4ddbf3112f2c2140858fa		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x341E 24856 bytes
font_01_sfnt_off00006c01.bin
e5df45a09fd76c24ea43a7fa28fc5fe559da15feee3d3577044ff876206ae01e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C01 17956 bytes

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