Malicious PDF — malware analysis report

Static analysis result for SHA-256 b48d13ef4f65cf91…

MALICIOUS

PDF

986.5 KB Created: 2010-02-28 18:54:53 +00:00 Authoring application: htmldoc 1.8.27 Copyright 1997-2006 Easy Software Products, All Rights Reserved.
MD5: e26dca9e70ae8758faf0c4b8fda4b57f SHA-1: 07aabb85b986c3b9147be722e624de2ae4d3fbf2 SHA-256: b48d13ef4f65cf9104efe73dff6a68c885094c0a2ee44828b8dc69633ce271e1
368 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains embedded JavaScript and a PE payload, indicating a malicious intent to execute code. The PDF also utilizes a launch action targeting cmd.exe, suggesting an attempt to run commands on the user's system. The document's content and heuristics strongly suggest a social engineering lure to extract sensitive information such as recovery secrets or private keys.

Heuristics 12

  • 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\\12345.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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.thekelleys.org.uk/dnsmasq/doc.html
    • http://securityreason.com/securityalert/6601
    • http://securityreason.com/securityalert/6600
    • http://www.security-database.com/detail.php?alert=CVE-2009-4418
    • http://www.suspekt.org/downloads/POC2009-ShockingNewsInPHPExploitation.pdf
    • http://www.ocert.org/advisories/ocert-2008-016.html
    • http://openvas.org
    • http://securitytracker.com/alerts/2007/Nov/1018976.html
    • http://www.openvas.org
    • http://www.ietf.org/rfc/rfc1323.txt
    • http://www.securityfocus.com/bid/37079
    • http://www.php.net/releases/5_3_1.php
    • http://www.php.net/
    • http://seclists.org/fulldisclosure/2009/Nov/228
    • http://www.securityfocus.com/archive/1/507982
    • http://php.net/downloads.php
    • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-4418
    • http://znc.sourceforge.net
    • https://www.isc.org/downloadables/11
    • https://www.isc.org/node/373
    • http://secunia.com/advisories/33404/
    • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5077
    • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0025
    • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0265
    • http://www.securityfocus.com/bid/33150
    • http://www.securityfocus.com/bid/33151
    • http://online.securityfocus.com/archive/1/11073
    • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-1999-0385
    • http://www.securityfocus.com/bid/503
    • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-1999-0621
    • http://www.us-cert.gov/cas/techalerts/TA08-134A.html
    • http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6026
    • http://www.microsoft.com/technet/security/bulletin/ms08-028.mspx
    • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-6026
    • http://www.securityfocus.com/bid/28398
    • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0080
    • http://www.securityfocus.com/bid/27670
    • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0087
    • http://www.securityfocus.com/bid/28553
    • http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-0043
    • http://www.securityfocus.com/bid/24811

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0818_000.js
1745130ab445ec3417e473b9247c40e550d73354fe21ae7566bdcfb8bd9493ee		 pdf-javascript-stream PDF /JS object 818 at offset 0xF6554 54 bytes
stream_001_off0000b955.bin
8242fedbb53a753d063a89cc9faab97becb906c951d1c6d54743bfeba91ebc31		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB955 45970 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.
stream_002_off00016d6b.bin
d63384cf260cfce85373c061cdd9fb0cfd93757a802ba824ca3d12fd6f809654		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x16D6B 44677 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.97, consistent with packed or encrypted content.
stream_004_off0002ce59.bin
913ff5daf102c70f02b77d2b95bbdc73ed569053a9cee859efa6c9b90abb88de		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CE59 35978 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.96, consistent with packed or encrypted content.
stream_071_off000702a3.bin
93019ff4c7f345b6b03ada2c60efc51f0f199f5356d8bf1b85cd9649420fa84f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x702A3 572928 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.93, consistent with packed or encrypted content.

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