PDF malware analysis — malicious · 5a0aac2719ee84a6

MALICIOUS

PDF

12.8 KB

MD5: d117c316fb60d1803163fa1015f05579 SHA-1: b6b376a6db3c644008f06a204403175cb65e99b4 SHA-256: 5a0aac2719ee84a62d3263f5e8bb88e737c69205b7ff0ee1c34543f2648e3f16

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically using the Collab.collectEmailInfo method. This JavaScript is further obfuscated and split into multiple streams, indicating an attempt to conceal its malicious actions. The presence of deobfuscated JavaScript files suggests the sample is designed to download and execute additional malicious content.

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-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.
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` `16e5c688952767f93185f139a910d346802aa0958cf80bc6dd5f71f4620d065a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12531 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7cbe47c40bd3efa19bf98ff5d10118e3870376dff6fd05146e5dfe6454c164b1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5180 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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