Malicious PDF — malware analysis report

Static analysis result for SHA-256 41ff94abc3782248…

MALICIOUS

PDF

38.4 KB Created: 2021-05-20 13:30:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ca3abd56c08d4b74a643010a5f0f68a4 SHA-1: ac03c16faad1942006330786ca8b98f0738da458 SHA-256: 41ff94abc3782248ed37f17dcb7ab92afe6bc09991c64f3a1ab36e4a1f323779
82 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one that appears to be the primary lure for a 'game hack'. The presence of heuristics indicating a visual download button and password-protected archive instructions strongly suggests a social engineering attack aimed at tricking the user into downloading a malicious payload. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/how-to-make-a-group-on-roblox-for-free-game-hack PDF link annotation
    • http://rollipolli.hu/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/coin-master-golden-cards-hack_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-foxy-food-coin-master_GM406889139.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/roblox-free-body_GM431946152.pdfIn PDF document text
    • http://rollipolli.hu/userfiles/files/free-roblox-website_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000335f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x335F 27036 bytes
SHA-256: 09df8318b156d940cc1a78bcfd32518508c7d4f38a529c1b4a861c436c22eadf
font_01_sfnt_off0000729b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729B 19020 bytes
SHA-256: 618aa5fa104ea73151876125e2b85ad7dcdc11323aacc6b5e0056594e37eb48c

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