Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb150d1d6577b76a…

MALICIOUS

PDF

1.24 MB Created: 2016-04-19 14:32:33 +07:00 Authoring application: Microsoft® Word 2013
MD5: 6e987c83fb8afa42c1a5927776454803 SHA-1: 77be92a9e8c35c04de09907de33690240f45c4d8 SHA-256: bb150d1d6577b76a2e6387a20a1768324550945b1b0b24c8e1448a6528635451
370 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File Execution: Malicious File T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains embedded JavaScript and a launch action that targets cmd.exe, indicating an attempt to execute arbitrary commands. This is further supported by the CVE-2010-1240 heuristic, which specifically flags this type of exploit. The embedded PE payload and the external URI suggest the download and execution of a secondary malicious component. The ClamAV detection also confirms its malicious nature.

Heuristics 12

  • Adobe Reader Launch action command execution critical CVE exact CVE_2010_1240
    PDF uses the Adobe Reader/Acrobat Launch action pattern associated with CVE-2010-1240: cmd.exe is invoked with attacker-controlled parameters, paired with an embedded/exported payload.
  • Launch action critical PDF_LAUNCH
    PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
  • 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.
  • /Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND
    PDF /Launch action specifies an executable target with parameters '/Q /C %HOMEDRIVE%&cd %HOMEPATH%&(if exist "Desktop\\PAYLOAD.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
  • ClamAV: Pdf.Tool.Agent-1388586 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Tool.Agent-1388586
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://www.malwaretracker.com/pdf.php

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0182_000.js
2a090086ccd7211f4e4ddab98ca7b88fee3c4f4d103e581d894f17b4aaf6e2d6
pdf-javascript-stream PDF /JS object 182 at offset 0x13DF52 56 bytes
stream_011_off001166ae.bin
9167390d75fd8b94d1d81c444db2f36752bd76e94b3ec1c64948133ef72d6a89
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1166AE 321784 bytes
stream_013_off00133365.bin
c7fd937bbc735fe3ed215c7bbd9d05a6ded95814b49f2e3cf57552a1de0b86dc
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x133365 73802 bytes