PDF malware analysis — malicious · 2a23b3883cd45a96

MALICIOUS

PDF

12.2 KB

MD5: 33f971149393f53b0bf350218b82c25b SHA-1: 478ba21c91c3f575d79b87177134403b94ce33b4 SHA-256: 2a23b3883cd45a961c61ee015042fa03d8fa84d20deb954a24a2e6a9492bc7bb

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains embedded JavaScript, which is triggered by the CVE-2007-5659 vulnerability. This vulnerability is known to be used for executing arbitrary code. The presence of multiple deobfuscated JavaScript files and a critical ClamAV detection further supports a malicious classification. The exact payload and delivery mechanism are not fully discernible from the provided evidence, but the exploit chain is clear.

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)
ClamAV: Pdf.Exploit.Agent-36079 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36079
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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` `ef8bdac794684ae9cd4eb7091d80e1c5ca478c06c639d72d01626c1f7ce78b6d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	578 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `878f60f13e57b07b865ed1d6feeeb33e6163614921202ffdb5d48f93f1335686`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12708 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d98ce270dff84568db71d8207a8f31f5df5d8e5d5adfdef5e6770d8e8261d773`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5288 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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