Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee447a622026e6c…

MALICIOUS

PDF

39.3 KB Created: 2021-05-23 23:04:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c16d03d478119f895208632b4aeecb83 SHA-1: 782e741ae42b7b4a6e14a1baac14808bb78a30ff SHA-256: 9ee447a622026e6cf67a0c299cbbe42d056789d2c3f6c9f5ffa4c4a2bac03ef1
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and text that lure the user with promises of free in-game currency, specifically mentioning 'Robux' and a 'generator'. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests that the document may be part of a multi-stage attack, potentially encrypting a payload that requires a password provided within the document. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8060

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/can-u-get-free-robux-game-hack
    • http://uctovnictvosnv.sk/images/login-robux_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/robux-free-online_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/games-to-get-free-robux_GM431946152.pdf
    • http://uctovnictvosnv.sk/images/pubg-uc-pakistan_GM1330123889.pdf
    • http://uctovnictvosnv.sk/images/moonactive-free-spins-link_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003278.bin
8f938dd0b2b78b5d781783a245c0bff7dee903db73ce47a18f19831a085407b4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3278 25744 bytes
font_01_sfnt_off00006d82.bin
baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D82 2844 bytes
font_02_sfnt_off00007743.bin
35bb0f01f69d1b5e790ed5f4c0eeb98998139975dc1eb58b588dc01b9002bbc1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7743 18532 bytes

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