PDF malware analysis — malicious · 93e7210fd8adf1e7

MALICIOUS

PDF

4.5 KB

MD5: 64e81b15509f5341c6370faa3604fc39 SHA-1: 80b0d9e191a33a8b6c4e1b2577b42080dd237991 SHA-256: 93e7210fd8adf1e76ed51bd89247884b67510878b5d678507aaf920d8f87b189

176 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript that utilizes eval() and String.fromCharCode() functions, indicating obfuscation. The critical CVE-2007-5659 heuristic confirms the exploitation of this vulnerability via the Collab.collectEmailInfo method. The deobfuscated JavaScript likely downloads and executes a second-stage payload, as suggested by the extracted artifact 'numeric_charcode_stage_000.js'. The lack of specific indicators for a known family leads to an 'unknown family' classification.

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Suspicious extracted artifact high 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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `9559ba34e06148ef859a75a6e6834b6f798476c4432bad0cd840e583f876a1fc`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	22390 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `a1a1465e38e9c3dc45b6464c1a671db12ea750e18ff16d5f1a91773f286fd9e5`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6620 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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