PDF malware analysis — malicious · 599d654bc929c8a6

MALICIOUS

PDF

12.8 KB

MD5: 8cdc1fc96d113bfd9be1b9fc0f5b3b95 SHA-1: 1b36d872bedd70ead0252df02a8b32446a4f35bc SHA-256: 599d654bc929c8a6e81107836cebc641b93d4203d52c7297273208203cb1ba81

198 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript and exploits CVE-2007-5659 using the 'collab.collectEmailInfo' method to decode and evaluate a stager. This stager is designed to download and execute a secondary payload, as indicated by the ClamAV detection 'Pdf.Exploit.Agent-36064' and the presence of deobfuscated JavaScript files. The attack pattern involves luring the user into opening a malicious PDF that triggers an exploit.

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)
Annotation subject percent-decoding eval stager critical PDF_ANNOT_SUBJECT_MARKER_EVAL_STAGER

OpenAction JavaScript forces annotation enumeration, reads an annotation /Subject payload with getAnnots(), rewrites marker bytes into percent escapes, decodes it with unescape(), and dispatches it through eval. This is a high-confidence exploit-kit staging pattern. It is intentionally not mapped to CVE-2009-1492 unless getAnnots() itself carries the crafted integer or long argument shape for that vulnerability.
ClamAV: Pdf.Exploit.Agent-36064 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36064
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` `a5c8f0f722df4dd9876a0087e1eee65bd3020c5995f94f6729f7e17f3f3677a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	331 bytes
`legacy_pdfkit_stage_000.js` `d42f93e701394e1974682d91aaa60a43d3c749f23d133eb5b9a8d3ad62f77976`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	12080 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d3ca8b7142509bcf7205c98b22794625905133ea777801582259f6ca8f361845`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	5009 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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