PDF malware analysis — malicious · a491b6e33905d1fc

MALICIOUS

PDF

8.3 KB

MD5: 656e03526ab191afbf32f71bee6eab75 SHA-1: 0ba0bc52bca78e7aef934b0a688b8bd0092ce672 SHA-256: a491b6e33905d1fc88dfa2fb021176f9cf72a51882a9eb9c2ec2bbfd1f2ac179

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic indicates that the JavaScript is obfuscated and uses a string-reversal technique to decode a payload. This payload is likely designed to download and execute a second-stage malicious file, a common technique for initial access and further infection. No specific family could be identified due to the obfuscation.

Heuristics 4

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)
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_obj0001_000.js` `dda64b4d5389addca32bcb42ca429415c793895ff17b54def54743423e3cc34a`	pdf-javascript-stream	PDF /JS object 1 at offset 0xF	40 bytes
`javascript_obj0013_001.js` `94ed1b7e2bc10fcc043a8a7da59652b5798c4b4a8c3c84d46a49019e807f2e31`	pdf-javascript-stream	PDF /JS object 13 at offset 0x367	16909 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `1782665ab6dcede341cc69dab0f1d3df757cb8702009c45e88acada48792788b`	deobfuscated-js	reverse-string concatenation decoded JavaScript at offset 0x367	2043 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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