PDF malware analysis — malicious · fcf4c752d57d701b

MALICIOUS

PDF

2.0 KB

MD5: df950424a9bbc8e5fef788a353d0860e SHA-1: 4c126cff3abc43a15da27990c5f5e0c848961942 SHA-256: fcf4c752d57d701b30de82f601c2ea7b096975070410ceb59e61cd5e38e7355e

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing obfuscated JavaScript, which is a common technique for exploiting vulnerabilities in PDF readers. The critical heuristic 'CVE_2007_5659' specifically points to the use of the 'Collab.collectEmailInfo' method, a known exploit vector. The JavaScript is further obfuscated using 'eval()' and 'unescape()', indicating malicious intent to execute arbitrary code. The file is detected by ClamAV as 'Pdf.Exploit.Agent-35930', confirming its malicious nature.

Heuristics 7

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-35930 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35930
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `f23e505f155bfa9b9f356fa9fddf8d7fcafcc37fc2df3878e575e72c00c819d4`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x6CF	697 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `17017afecb645839a42a35fba020769f348f9b220f37335ce99b4347781e5ff7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2622 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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