PDF malware analysis — malicious · d6e603b2dcd9c0bb

MALICIOUS

PDF

12.3 KB

MD5: 4586d8ac3486de8118cc412e24c6c59f SHA-1: daaaf8bfb445049ad2901beb98c212e3d4ddc42b SHA-256: d6e603b2dcd9c0bbac58fb48bbf60f1654656f8e474c0b64007b5e11d1231e3b

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link or File: User Execution: Malicious Link T1204.002 Malicious Link or File: User Execution: Malicious File

This PDF file contains embedded JavaScript, identified by multiple critical heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_ANNOT_SUBJECT_MARKER_EVAL_STAGER. The CVE-2007-5659 heuristic specifically points to a stager that decodes and evaluates JavaScript from metadata. The ClamAV detection of 'Pdf.Exploit.Agent-36062' further confirms its malicious nature. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, likely contribute to downloading and executing a second-stage payload, although their specific actions are not fully detailed in the provided evidence.

Heuristics 7

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `09542987be5f4cb3ed7f0c3e8416b20b08ad48fedf1af0fe56f19b6b7cd20140`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11920 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1ef8a646a635f217896f9b944cccae0cc14e65496b18c6a334cc395a44c4fb73`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4886 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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