PDF malware analysis — malicious · 48a86032f7dc1beb

MALICIOUS

PDF

12.3 KB

MD5: 8b6d788e0878970a98074f7bb7c18dc1 SHA-1: dbb346e0ebe9db6a2bbfae4b711040e748af5f36 SHA-256: 48a86032f7dc1beb32db0bd6e352bd6498cb066f5908128fe7712a121f381ddb

200 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

This PDF file contains embedded JavaScript, triggered by a vulnerability (CVE-2007-5659) related to the 'Collab.collectEmailInfo' function. The critical heuristics indicate it acts as an eval stager, likely deobfuscating and executing JavaScript found in embedded streams. ClamAV also identified it as Pdf.Exploit.Agent-36062, suggesting it's part of an exploit chain designed to download and execute further malicious content.

Heuristics 7

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.
ClamAV: Pdf.Exploit.Agent-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser exited 1. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `077a9f9ba76b896c70d4ff615cb93668bcbf3cb01a3328231b4f0b9b1d88e764`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12077 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `abeead9c5e2754ffe90e2d5b340dbfee81f80680af6819b4e5229e329c94c4b9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4984 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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