PDF malware analysis — malicious · a80346b2ca70f038

MALICIOUS

PDF

180.4 KB

MD5: f095d08612eb4a2c08f65d890a08c275 SHA-1: 74e857692f0edaf80a8b67de3e02cda253097221 SHA-256: a80346b2ca70f0387d909be88a70e6cac68a90134ab8992cde7f43b3c4ea26db

318 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

This PDF file is malicious, as indicated by multiple critical heuristic firings including ClamAV detections for 'Pdf.Exploit.Agent-36307' and 'Js.Exploit.Shellcode-18'. The heuristics specifically point to the exploitation of CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992 through embedded JavaScript. The embedded JavaScript, particularly the deobfuscated 'legacy_pdfkit_stage_000.js', is designed to download and execute a second-stage payload, which is a common technique for malware delivery.

Heuristics 8

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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36307 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36307
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `4d0ada7caf86de3c7ffd4f24df9aa934de54ffb642bab5652d3a953769d6a824`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1E7	2572 bytes
Detection ClamAV: Pdf.Exploit.Agent-36307 Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `431e59346dae5a02299f1d7e4a7c7d5f8e5312f6bc8db8cf37de17e13cf1b791`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xC27	20147 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.