Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b130abdc8c9e5d0…

MALICIOUS

PDF

347.6 KB Authoring application: Python PDF Library 055 http072057057pybrary056net057pyPdf057
MD5: cb84578ed0898264cc55d9f3ecaf755c SHA-1: 6087edf4ff51a1ebc5c347a4d641ee657b6d7691 SHA-256: 0b130abdc8c9e5d0aa319dac2bcf9ed2be9e1fc0d5da2c2e8b1b9da1083cf995
278 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and RichMedia (Flash) content, which is highly suspicious. Static analysis detected embedded files, including a secondary PDF, and ClamAV identified the sample as 'Pdf.Dropper.Agent-7227222-0'. The embedded SWF file, detected by ClamAV as 'Swf.Malware.Agent-7081584-0', strongly suggests the PDF is acting as a dropper for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 9

  • Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE
    A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
  • ClamAV: Pdf.Dropper.Agent-7227222-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7227222-0
  • 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.
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://adobe.com/AS3/2006/builtin

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
pushpro.swf
015ae40c5cd76d2752f517e092c6e9097adfef08e428defe0c62b08e98ab7af7		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0xB4F 772 bytes
pushpro_1.swf
3f8e0576de2e9af38360a78e3ca79d41fb9060cefdb628cb69589ea03d1d3358		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0xB4F 772 bytes
polyglot_child_pdf_off000555bf.pdf
93c37656a68aa9f4db1ac56d351f64362db50925be1d571245b2ccdfc6b47f3c		 polyglot-child-pdf Secondary PDF body inside pdf container at offset 0x555BF 6297 bytes
Detection
ClamAV: Swf.Malware.Agent-7081584-0
Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.