Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2fde7aa70768e18…

MALICIOUS

PDF

44.5 KB
MD5: 1724dc2215bcc1d7431b0d4849ae6f0b SHA-1: 09648b8e4c3e96d568690378b0f3516450419628 SHA-256: b2fde7aa70768e1866888ec7cd060e60fd30e9a75b8d1a792c5251c49165d606
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information T1027 Obfuscated Files or Information T1204.002 Malicious File

This PDF file contains embedded JavaScript and a Windows executable payload. The ClamAV detection indicates the embedded executable is 'Win.Trojan.Swrort-5710536-0', a known trojan. The JavaScript actions and embedded executable strongly suggest this PDF is a delivery mechanism for malware. The embedded URL, while marked benign, is associated with the delivery.

Heuristics 7

  • Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD
    PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
  • ClamAV: Win.Trojan.Swrort-5710536-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Swrort-5710536-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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 http://mulhereshd.blogspot.com/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
root_Windows_Tool.exe
506be7302747ac74bce86a592b427df7f5eb988056f008b97c349a741fee0a83		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0x371 73802 bytes
Detection
ClamAV: Win.Trojan.Swrort-5710536-0
Obfuscation or payload: unlikely
javascript_obj0009_000.js
0d28d4186addc634d8e9f82b0f3384958116fb9e48000815e7cb07a6caec26da		 pdf-javascript-stream PDF /JS object 9 at offset 0xB096 71 bytes
javascript_obj0009_001.js
509ecd5e59ef160da2a51ed988ee4e00d00a41ce7086dc218913506296f3e762		 pdf-javascript-stream PDF /JS object 9 at offset 0xB096 69 bytes

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