PDF malware analysis — malicious · 41738eda0b564074

MALICIOUS

PDF

12.5 KB

MD5: 0dc554b48725172fa2c7b5edc80b82e2 SHA-1: 9648e2c36a5b32ee88d6489f93205ebea81a8f10 SHA-256: 41738eda0b564074d4c27ddee5a68e1e093034a372aae3dff3b232256845e2f8

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the use of the Collab.collectEmailInfo JavaScript function, a known method for exploiting PDF vulnerabilities. This function is used to construct and execute JavaScript, likely for downloading and executing a second-stage payload. The presence of deobfuscated JavaScript files further supports this. The exact nature of the second-stage payload cannot be determined from the provided evidence.

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_obj0007_000.js` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `cec2bb9085f2053ccb32c137b34262706c0fe57ae1d42b01ddfa7ba780794d92`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12328 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c6145986e2554a8a218f16a99c476d20b1d61bcd45424464e48a28e9254981b9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5095 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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