PDF malware analysis — malicious · b0ca607875ac3f4c

MALICIOUS

PDF

5.0 KB

MD5: 34b0bdaf8a6625fee7721e8bf3333c81 SHA-1: bdcb827beb991561402ca9e80ab6c2e2e650c932 SHA-256: b0ca607875ac3f4cb550cd02e8d86c8c14475b30766fcebfe240113993d16122

378 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file exploits several known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) to execute embedded JavaScript. The JavaScript, detected by ClamAV as Js.Exploit.Shellcode-18, is likely responsible for downloading and executing a second-stage payload, as indicated by the ClamAV detection of Pdf.Exploit.Agent-36895. The deobfuscated JavaScript and PDF info fields are the primary drivers of this analysis.

Heuristics 9

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
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-36895 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36895
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.
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0014_000.js` `df513583b592dc35d1fe8dcdd68b6a027095a8a86a07ce632dd5dc71f1a568fa`	pdf-javascript-stream	PDF /JS object 14 at offset 0x1076	713 bytes
`stream_000_off00000168.bin` `55483603b864cc62a863ac3af64a1863adbbf0194f69e1308957df002a692547`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x168	16205 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 long base64-like blob(s).
`stream_001_off0000082c.bin` `615b7570d6ed7ee55f395a6c014e2308e95c0087fd6c553b921b28b447627dd4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x82C	16200 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`info_stride_js_000.js` `f2285670067609e11dcc8d35ef90d5533f13ff330e47841cb6078241bb95802d`	deobfuscated-js	PDF /Info fields via stride 5	6481 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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