PDF malware analysis — malicious · f9d5a24b58c86c15

MALICIOUS

PDF

12.8 KB

MD5: 4a13b96dd056c0075c553588f0211c44 SHA-1: b92d1268d06c8ba427beefc1ee7b064873694a47 SHA-256: f9d5a24b58c86c1532aef95cdb183f6244084a38c0b403ebb4c6ec591bda302f

200 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript that is obfuscated and uses a known exploit technique (CVE-2007-5659) involving the 'Collab.collectEmailInfo' method to execute arbitrary code. The heuristics indicate this is a stager designed to download and execute a second-stage payload, as evidenced by the extracted JavaScript files.

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` `e2cb109de20a9aff3876bc522bf324cbe028e6c86222e1deddb6e18ee5c31619`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12480 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `214993178fb77d2316ccf4d5d5b4fbd87908ecae4d65a9cb76dcdec693b829eb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5174 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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