PDF malware analysis — malicious · da1390cf33e4591d

MALICIOUS

PDF

12.5 KB

MD5: a12a663a020050d2655dad29e4585a05 SHA-1: f9b2794cde7669c5c8230625f43cf2ef2f256b64 SHA-256: da1390cf33e4591dbe66ae4b83daec4798ac080da9f6d2dd398eaf103e12b790

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic indicates the use of the 'collab.collectEmailInfo' function, a known method for exploiting PDF vulnerabilities to execute JavaScript. This script is likely designed to download and execute a second-stage payload, as suggested by the ClamAV detection of 'Pdf.Dropper.Agent-9448905-0' and the presence of deobfuscated JavaScript files. The extracted JavaScript objects and deobfuscated files point towards a dropper functionality.

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.Dropper.Agent-9448905-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-9448905-0
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` `a8cd7ba81d174d20864c288c55bdf4613ffdad28eb1529eccd6a8f6e4cd12fe5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12193 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `54d20ecf77f0c7a1992bce6e587474c526b26cc9b3359fa33a52213152644d6d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5017 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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