PDF malware analysis — malicious · d0e59c1101061d26

MALICIOUS

PDF

11.7 KB

MD5: 2bcffead273416c12aeeeff64980e6ec SHA-1: a4040dc18165a050c7673bdd6f46cb2ab78cd65d SHA-256: d0e59c1101061d2656190dd01b0f89598d07d34c5fd183b6f43428210542e433

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link or Hypertext System

The critical heuristic CVE_2007_5659 indicates the exploitation of a vulnerability in PDF handling, specifically using JavaScript via `Collab.collectEmailInfo`. The embedded JavaScript streams, particularly `legacy_pdfkit_stage_000.js`, are heavily obfuscated but suggest the execution of further malicious code. The ClamAV detection `Pdf.Exploit.Agent-36079` corroborates the malicious nature of this PDF. The primary attack vector appears to be leveraging a known PDF exploit to deliver 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)
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` `38c3b444e52420b99b8855a380dc2b762a9550ac98fd417e25ceea5b364fea39`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `877f42ae74d201f9a0f24643e753e8fcb8a9102394cc12dd2d4c6b78e38e5bfe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	4998 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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