PDF malware analysis — malicious · aada4140c625bcad

MALICIOUS

PDF

12.4 KB

MD5: 598903e6b1bbe8f08a2aec37ed6fbae1 SHA-1: 69247230cf892bed2060f8bd9776d876c3eaa5e4 SHA-256: aada4140c625bcad290feda84a5407126495cc431491817e4856e11845f6ddc9

198 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file contains embedded JavaScript, triggered by the 'Collab.collectEmailInfo' method which is known to be vulnerable (CVE-2007-5659). The JavaScript is obfuscated and appears to be a stager designed to download and execute a second-stage payload. The ClamAV detection 'Pdf.Dropper.Agent-7291567-0' further confirms its malicious nature as a dropper.

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.Dropper.Agent-7291567-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7291567-0
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` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `9ae69a389ce0c022925dc8d14ed75a4efe05a7d8bcad2b50b25b67cba8a2589d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12227 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2fa9838830e6ddf9b0ff864c0f377b90f0713a18280a632292f7d8b2de831b50`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5022 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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