PDF malware analysis — malicious · 8e83420329299227

MALICIOUS

PDF

193.2 KB Created: 2008-01-27 21:22:13 -08:00 Authoring application: LaTeX with hyperref package (via pdfeTeX-1.21a)

MD5: 02cc316d6ec925e49f90d5185ab5b2fd SHA-1: a2f494c8abde140dd8e61521ee9e799dfaa2b74e SHA-256: 8e834203292992277c1307bc26ea745cb53fc8b99c213e1de4621a4da707fc75

468 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 User Execution: Malicious File T1059.003 Command and Scripting Interpreter: Windows Command Shell T1105 Ingress Tool Transfer T1566.002 Phishing: Spearphishing Attachment

This PDF document exploits CVE-2010-1240 via a launch action to execute cmd.exe. The command attempts to change directory and then likely proceeds to launch an embedded PE payload, detected as Win.Trojan.Rozena-131 by ClamAV. The PDF itself is detected as Pdf.Exploit.Agent-22118. The document body discusses ActiveX controls, suggesting a lure related to software functionality or exploitation.

Heuristics 14

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\\ActiveX_active_expl.pdf" (cd "Desktop"' — references a known-dangerous executable (cmd, PowerShell, etc.).
ClamAV: Pdf.Exploit.Agent-22118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-22118
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.
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.
Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND

Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
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.nologin.org
- http://www.milw0rm.com/exploits/4420
- http://www.milw0rm.com/exploits/4720
- http://www.milw0rm.com/exploits/4825
- http://taossa.com
- http://labs.idefense.com/software/fuzzing.php#more_comraider
- http://en.wikipedia.org/wiki/ActiveX_control
- http://msdn2.microsoft.com/en-us/library/aa751968.aspx
- http://www.metasploit.com/users/hdm/tools/axman/

Extracted artifacts 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0221_000.js` `e5da64b53966878f4560a559ef01fe3451d574f095a10b50b9c54d1ac6f30462`	pdf-javascript-stream	PDF /JS object 221 at offset 0x30060	68 bytes
`stream_023_off000246b1.bin` `bf114597a620b3948e9b768d50f35907c33143632b7af679b32f3fb3c986f360`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x246B1	4657 bytes
`stream_025_off0002b35a.bin` `fb1a9fe4a163ab1ea11a3db3cbae54c38a9ac8846572435dc5b2c46887bac68b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2B35A	37888 bytes
Detection ClamAV: Win.Trojan.Rozena-131 Obfuscation or payload: unlikely
`font_00_type1_off00017874.bin` `0028664400f5755b41b28091e0ae85cb7a6622f39234ffe01d60bda79833c742`	pdf-font-stream	PDF embedded font (type1) at offset 0x17874	7568 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.64, consistent with packed or encrypted content.
`font_01_type1_off00019633.bin` `2cc8fe11bdd3cb791030d6356cb0cad82d8e1107187568e6a4bc69cdf2ef95bb`	pdf-font-stream	PDF embedded font (type1) at offset 0x19633	17326 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.83, consistent with packed or encrypted content.
`font_02_type1_off0001da9d.bin` `ff6aa1fb1a43d830a31d4d1654b502a9112295572db0afaa85f733be60e25cbb`	pdf-font-stream	PDF embedded font (type1) at offset 0x1DA9D	8038 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.66, consistent with packed or encrypted content.
`font_03_type1_off0001fa8b.bin` `e2d57d48cfa5172193cfbbc869adf4e7f1cfcb7c867d5e4a75d976f4f2d39b28`	pdf-font-stream	PDF embedded font (type1) at offset 0x1FA8B	11006 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.74, consistent with packed or encrypted content.
`font_04_type1_off00022608.bin` `85fc13af728ef001646358bb0039840928d8c734203777246258b87b93d8c5d5`	pdf-font-stream	PDF embedded font (type1) at offset 0x22608	5249 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.43, consistent with packed or encrypted content.
`font_05_type1_off00023b5d.bin` `86b5030002c840fbbdb8b0db06f90dafa297bd53154509fbc033e1b70d00ce5c`	pdf-font-stream	PDF embedded font (type1) at offset 0x23B5D	2992 bytes
`font_07_type1_off00025995.bin` `fe05b48f9bf68761027703dde521ec1757bf695ab369bd1f023d8677855caf19`	pdf-font-stream	PDF embedded font (type1) at offset 0x25995	14896 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.80, consistent with packed or encrypted content.

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