PDF malware analysis — malicious · d04a0cd302f5bbdc

MALICIOUS

PDF

12.8 KB

MD5: 7909907229914c6abf09f480b4f1f98f SHA-1: 3a9f222b745ab1290e44ba2cb850803a73d4d189 SHA-256: d04a0cd302f5bbdc2f94c135f737f0c440fd9fa4c979c4acdb2f15cfafd069e6

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

This PDF file exploits CVE-2007-5659 using the Collab.collectEmailInfo function to execute JavaScript. The embedded JavaScript, found in legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, is designed to download and execute a second-stage payload. The specific exploit mechanism and the lack of clear indicators for a known family lead to an 'unknown family' classification.

Heuristics 5

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)
Annotation subject percent-decoding eval stager critical PDF_ANNOT_SUBJECT_MARKER_EVAL_STAGER

OpenAction JavaScript forces annotation enumeration, reads an annotation /Subject payload with getAnnots(), rewrites marker bytes into percent escapes, decodes it with unescape(), and dispatches it through eval. This is a high-confidence exploit-kit staging pattern. It is intentionally not mapped to CVE-2009-1492 unless getAnnots() itself carries the crafted integer or long argument shape for that vulnerability.
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` `5685076fda3413249be2af30bb933333347b3d8fdbf46f0e4e864775af839823`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12520 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `666bf254468d38ef30a4ddb0d10ec2fadf26dc42e3524019d0035518f22f62ca`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5190 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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