Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d7e1aec0bbe7136…

MALICIOUS

PDF

43.1 KB Created: 2021-05-21 10:01:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2e13c142377da1f59d7d0f19cb3f1df2 SHA-1: 97b064d39707e1958c6a762296fa43f821690767 SHA-256: 8d7e1aec0bbe7136607bfe20164594f10e885f406c7779ea30585b3b5a80844c
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URIs and a clickable link pointing to IP addresses and domains associated with game hacks and free in-game currency offers. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the structure and embedded links suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9506

Heuristics 4

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/blox-land-free-robux-game-hack
    • http://118.174.0.244/UserFiles/File/rbxoffers-com-free-robux_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-facebook-hack_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/free-robux-that-actually-works_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-spin-hack-no-verification_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-apk-hack-35-8_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003521.bin
c4f56f73e69b1c090538606f7fd254e2b6e1058c1276074d12d447cbfdd33b96		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3521 36520 bytes
font_01_sfnt_off000086fe.bin
43325585731fb5abef9629b4ee3027de7c41cdd34c16702b82f5d396e8a55598		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86FE 18492 bytes

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