PDF malware analysis — malicious · fb0f30625f3d994f

MALICIOUS

PDF

40.2 KB

MD5: 4c4ff3b9dd71caab37669b36306a8d33 SHA-1: 414ba0072bd5102fcae7491b16cba447755d2772 SHA-256: fb0f30625f3d994fe9a591a132ade2468d5cdb325f97662e726e58ffb753a646

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript and is flagged for exploiting CVE-2007-5659, which involves the 'collab.collectEmailInfo' function. This indicates an attempt to leverage a known vulnerability for code execution. The presence of U3D content and ClamAV detection further supports its malicious nature. The embedded JavaScript streams, particularly 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are likely responsible for downloading and executing a second-stage payload.

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)
U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
ClamAV: Pdf.Dropper.Agent-7327281-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7327281-0
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 4

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 0x1A4	343 bytes
`legacy_pdfkit_stage_000.js` `77f6e5eb129bef993f276622468d253d1ce7338a7ed1440b204d0064a5414e84`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F7	12867 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4f24bad3e44bd3dac134bc573a5ddf7f5d5246c5703d70595cbef40f1ae02b05`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F7	5369 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`u3d_00_off00003446.bin` `48816569ab4f370009a917ef6429edbe09e4dfe8a63b00a0a0f75a904c62ba94`	pdf-3d-stream	PDF U3D 3D stream at offset 0x3446	27449 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

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