PDF malware analysis — malicious · 901b1981f560c3e9

MALICIOUS

PDF

11.8 KB

MD5: b0d4fa0c99852d3d7e1df39427768a9d SHA-1: 5b5c436ad9fc964b0a1c5ad9861bc55a9050d444 SHA-256: 901b1981f560c3e992583c042f69c7a65ed62af7f401c3802f076d8b4186b678

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by multiple heuristics including CVE-2007-5659 which specifically targets the 'Collab.collectEmailInfo' function. This function is known to be used in PDF exploits to execute arbitrary code. The presence of deobfuscated JavaScript files further indicates malicious scripting activity. The exploit likely leads to the download and execution of a second-stage payload.

Heuristics 5

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.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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_obj0007_000.js` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `44a5b34508f99e14bc45cc14e3c3ea2aa21cad880c6d1c2e4e00382795231ffb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12198 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `476a31da4035e3b80be63565d10f060bc797f1964e339422c0f86ea3ec60390f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4985 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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