PDF malware analysis — malicious · d5a9f00f9129aaa4

MALICIOUS

PDF

231.7 KB Created: 2009-10-26 13:04:45 -05:00 Authoring application: LaTeX with hyperref package (via pdfTeX-1.40.3)

MD5: fb561eea79604824f6c2b1f37af2e213 SHA-1: 4caa0b55914c5b4af3a57771076f436ed90eaacf SHA-256: d5a9f00f9129aaa4a33f4de0b8d4a10c27609af81818c7382b1ae3d629769255

428 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File Execution T1204.002 Malicious File Execution: Malicious File T1059 Command and Scripting Interpreter T1059.003 Command and Scripting Interpreter: Windows Command Shell

This PDF file contains embedded JavaScript and a launch action that executes cmd.exe, indicating an attempt to exploit vulnerabilities and run arbitrary commands. The critical heuristic PDF_EMBEDDED_PE_PAYLOAD confirms the presence of an embedded Windows executable. The ClamAV detection on the extracted artifact (Win.Trojan.Swrort-5710536-0) further supports its malicious nature. The embedded IP address and the command execution instruction are key indicators of a malicious payload delivery.

Heuristics 14

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\\users_guide.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
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
Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL

PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
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://127.0.0.1:55555/
- http://www.uninformed.org/?v=1&a=3&t=pdf
- http://www.harmonysecurity.com/files/HS-P005_ReflectiveDllInjection.pdf
- http://www.metasploit.com/
- https://bugs.launchpad.net/bugs/282302
- http://metasploit.com/framework/download/
- http://metasploit.com/framework/support
- http://subversion.tigris.org/faq.html#proxy
- http://www.metasploit.com/documents/meterpreter.pdf
- http://spool.metasploit.com/
- http://marc.info/?l=bugtraq&m=104612710031920&q=p3

Extracted artifacts 15

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0478_000.js` `a8e0025aba07b8e30a4ff8ec082b173c5f1987520ae4a404f054aa61dd32dea2`	pdf-javascript-stream	PDF /JS object 478 at offset 0x399F7	60 bytes
`stream_027_off00013093.bin` `98b4c9d62a1d55ba5c43f20cc3acac57ab4a47bd28f69efcb1500d7796b3fe92`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x13093	9832 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.88, consistent with packed or encrypted content.
`stream_040_off0002ed04.bin` `14aff4208696214e8f7a3a4617909eadd652f6001a99d56ce9b26993d37399a0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2ED04	73802 bytes
Detection ClamAV: Win.Trojan.Swrort-5710536-0 Obfuscation or payload: unlikely
`font_00_type1_off0001568a.bin` `60b30b84dd9c5c5252d45e27e7a7e249447bef3e349a4f842aba359909dc48f1`	pdf-font-stream	PDF embedded font (type1) at offset 0x1568A	10861 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.87, consistent with packed or encrypted content.
`font_01_type1_off00018036.bin` `e6fc6804f3f03b066f2f270a2931efc6f494bfff84a593cbf588bffc17e520b3`	pdf-font-stream	PDF embedded font (type1) at offset 0x18036	17591 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.90, consistent with packed or encrypted content.
`font_02_type1_off0001c3c6.bin` `5d2b51b74060f9561f0131a8e74384197374bf191b9eb35bf4b4a8d04bfadd02`	pdf-font-stream	PDF embedded font (type1) at offset 0x1C3C6	3288 bytes
`font_03_type1_off0001d0e9.bin` `29285ea75d9663dd2bf6af3bd3bae40e82ea4851ef9bb55cd917eeff15aea4b5`	pdf-font-stream	PDF embedded font (type1) at offset 0x1D0E9	4794 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.77, consistent with packed or encrypted content.
`font_04_type1_off0001e3b0.bin` `4b2e74a3d572b425d807f80f59917fc7b2a4bd9fdaddbd487b3520ff1f0f4017`	pdf-font-stream	PDF embedded font (type1) at offset 0x1E3B0	1963 bytes
`font_05_type1_off0001ebd7.bin` `dbab26b9e9d89bbb0d00262461da26e552a1b1ed12e88fede3e572aad218c190`	pdf-font-stream	PDF embedded font (type1) at offset 0x1EBD7	1954 bytes
`font_06_type1_off0001f3f5.bin` `40fbf7968458fa48582d153167dc0d0eb407bc388a98296d8e8212b51bab7ee7`	pdf-font-stream	PDF embedded font (type1) at offset 0x1F3F5	6518 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.82, consistent with packed or encrypted content.
`font_07_type1_off00020d3e.bin` `b49c2c086e9c589c6242d405a570a07fdba211181af8821afdbe9eeefd427c13`	pdf-font-stream	PDF embedded font (type1) at offset 0x20D3E	1326 bytes
`font_08_type1_off000212d9.bin` `c01f655b28cb429b1871e22dd89fa78fd8202b582539c7324a543c408d8df743`	pdf-font-stream	PDF embedded font (type1) at offset 0x212D9	3910 bytes
`font_09_type1_off00022273.bin` `e59fa527cc81f200139dc3e59f50f0f216df954cdbbd7122cd28b13374a43178`	pdf-font-stream	PDF embedded font (type1) at offset 0x22273	14877 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.88, consistent with packed or encrypted content.
`font_10_type1_off00025ba6.bin` `c966544533a4b24b4a363a64cbca036c550b152652663100f2bcc226b37d6be3`	pdf-font-stream	PDF embedded font (type1) at offset 0x25BA6	12677 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.87, consistent with packed or encrypted content.
`font_11_type1_off00028c51.bin` `2a515d3352f53ccc7dccfa2dd9f82c79ce31cc7ade17182ab62d3a69a8bd8da7`	pdf-font-stream	PDF embedded font (type1) at offset 0x28C51	3814 bytes

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