PDF malware analysis — malicious · 98fa1ac6047be006

MALICIOUS

PDF

12.2 KB

MD5: 80244fcaf17bdc8abfac3d4bb84f9b78 SHA-1: 1ca92bc17e2ffd3b1bd713fbcc5f85f6252eb002 SHA-256: 98fa1ac6047be0067584512b40410d488d04df6f2687cfd441d09e049f29af3c

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 CVE-2007-5659 which specifically notes JavaScript execution via PDF actions. The ClamAV detection 'Pdf.Dropper.Agent-7285324-0' further confirms its malicious nature. The deobfuscated JavaScript files 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' are likely responsible for downloading and executing a secondary payload, a common dropper behavior.

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-7285324-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7285324-0
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` `59d45ec0b4607e3dea90e89f205bc9404ae98196ff599e80230e6c2d0cd4183e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	11851 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4200d1d79be83140d186f4d4f544cf2aaeee6e29ed2661ddf088eebb7d6499dc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	4922 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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