Malicious PDF — malware analysis report

Static analysis result for SHA-256 e79e813a06b5ce9c…

MALICIOUS

PDF

41.4 KB Created: 2021-04-29 11:04:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 911ab3348a7bd3b87e4b04a57033d799 SHA-1: 712f7602a4efc0471dc680fe9e70c81e1ecc64fb SHA-256: e79e813a06b5ce9ce15e1914e93e2b8c7ea706de0c9754b3c9181aa3605eee93
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs and a visual call-to-action, strongly suggesting a lure to download further malicious content. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to 'Roblox' and 'hack', aligning with the observed URLs pointing to game exploit-related files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/roblox-new-free-items-2021-game-hack PDF link annotation
    • http://122.201.26.170/files/editor/files/roblox-console-robux-hack.pdfPDF link annotation
    • http://122.201.26.170/files/editor/files/how-to-get-free-robux-legit-no-survey.pdfIn PDF document text
    • http://122.201.26.170/files/editor/files/roblox-buble-hack-tutorial.pdfIn PDF document text
    • http://122.201.26.170/files/editor/files/free-uploader-roblox-exploit.pdfIn PDF document text
    • http://122.201.26.170/files/editor/files/roblox-mmc-zombies-project-hacks-script.pdfIn PDF document text
    • http://122.201.26.170/files/editor/files/why-you-shouldnt-trust-free-robux-scams.pdfIn PDF document text
    • http://122.201.26.170/files/editor/files/free-robux-official-site.pdfIn PDF document text
    • http://122.201.26.170/files/editor/files/surveytool-free-robux.pdfIn PDF document text
    • http://122.201.26.170/files/editor/files/free-robux-codes-2021-october.pdfIn PDF document text
    • http://122.201.26.170/files/editor/files/roblox-catalog-item-hack.pdfIn PDF document text
    • https://freerobux.cyouIn 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_003_off000043a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x43A2 25768 bytes
SHA-256: fedc1e688ac493eed8a79f0867ed0854a88bf011152c958684223a36be6bc776
font_01_sfnt_off00007e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E08 18876 bytes
SHA-256: 323020fc793cb82b0860f7425b2813b60cecaa7edf06b7a429ff64e0cdfca5f5

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