PDF malware analysis — malicious · 1b03d282cee240bd

MALICIOUS

PDF

12.1 KB

MD5: de0f63df9713039786beea2d64e722c8 SHA-1: 5d261225e19804834b67be71960810402c16d357 SHA-256: 1b03d282cee240bd1b03f203ded41e0f519248b9c652cfe3f6dffdb0ec518245

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically points to the use of 'collab.collectEmailInfo' to execute JavaScript, which is then further processed by extracted files named 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. This indicates the sample is designed to exploit a PDF vulnerability to run malicious code, likely as a downloader or initial stage of a larger attack.

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.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `5c7db026ac3d4102d76bb07aecd4dc030254d4f327afc37a41a4daa4e6e6baca`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12422 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `eab49310b741962de5e2eb15d96afb0b02c2a7e20d448fbb08c4edd9d39b6fde`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5160 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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