PDF malware analysis — malicious · b4dd619e3ca8c279

MALICIOUS

PDF

1.95 MB Created: 2010-01-01 07:27:45 Authoring application: Fexaxououazobb

MD5: 67c914010b764dd689b694ec0be008c6 SHA-1: 81b4f8b6802dbaadd09b204085e4b554825bafce SHA-256: b4dd619e3ca8c2794cc45d44d6f9a6b4e86b72f98bb727814e010de1a601beb6

318 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The sample is a PDF document that leverages multiple critical vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) to execute embedded JavaScript. This JavaScript is further identified as malicious by ClamAV, with one extracted artifact specifically flagged as 'Js.Exploit.Shellcode-18'. The primary function of the embedded scripts appears to be downloading and executing a second-stage payload, as indicated by the 'Pdf.Dropper.Agent-7295157-0' ClamAV detection.

Heuristics 8

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Dropper.Agent-7295157-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7295157-0
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.
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.
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.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `39854fff181f2b0c93a710e91cad0d0c8a8a1814ce2d5afeb9180044dc9ce2fd`	pdf-javascript-stream	PDF /JS object 12 at offset 0x4C9	721 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0028_001.js` `dd0e4fe730241a2281aacc385f5e2e9b33596edef10d633de7fe54ec5b53cb9f`	pdf-javascript-stream	PDF /JS object 28 at offset 0x1B9	1749 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `362ddefbcd83ed99a67fdb0129bc6dba8f7f6020d769736967428cc6db0d209d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x6C8	20581 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 44 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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