PDF malware analysis — malicious · a00e11de5f407faa

MALICIOUS

PDF

75.7 KB Created: 2009-11-12 19:41:25 Authoring application: PDF Library 1.5.8 (via PDF Library 1.3.7)

MD5: cdaa94248a067a5c5e72e41eb21f2d1a SHA-1: 70755009f69dcd104e5d6998bfca39c0d9078396 SHA-256: a00e11de5f407faaab7adf8da2e9c13c95bc1db490a0d06efb9f3e4913c7fb46

340 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains multiple critical heuristic firings indicating exploits for CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. These exploits target Adobe Reader and are used to execute embedded JavaScript. The deobfuscated JavaScript, named 'legacy_pdfkit_stage_000.js', likely serves as a second-stage payload downloader or executor, as indicated by ClamAV detection on extracted artifacts. The attack pattern is consistent with exploit-kit delivery mechanisms.

Heuristics 10

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
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)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV: Pdf.Exploit.Agent-36110 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36110
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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 failed: PSSyntaxError. 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `98ea37be64f7fb324129728aff241c27490aa2a13c65998d393074313299d8e4`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A5	38270 bytes
`legacy_pdfkit_stage_000.js` `6253cd11fce00033053f738ae055ff17508ac2878bb08b10896af46309c5fdeb`	deobfuscated-js	numeric array subtract-key decoded JavaScript at offset 0x1A5	9886 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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