PDF malware analysis — malicious · ec22eeb0de6062a8

MALICIOUS

PDF

9.2 KB

MD5: 0b7f148b70568604028cb078c8a4d7ec SHA-1: 5d22f574f8fa9afee254c3751ae1163c4012248e SHA-256: ec22eeb0de6062a81565d5914da82cd65f59fc9a15284580a2d26cc9c8af6854

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF document that exploits CVE-2007-5659, as indicated by the 'Collab.collectEmailInfo' heuristic. This exploit involves executing obfuscated JavaScript embedded within the PDF. The JavaScript is likely designed to download and execute a second-stage payload, a common technique for malware delivery. The presence of multiple deobfuscated JavaScript files and the ClamAV detection further support its malicious nature.

Heuristics 6

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-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `dd262a0d0265f05dab23930b6635afaffb375b44a7f544ca511b1786a69a388d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11797 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f241d551135198e2cf066501d44eaf7f6e21c4bac2b400aae4c31a986ab972b5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4931 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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