PDF malware analysis — malicious · 7c08f5d73ea43a05

MALICIOUS

PDF

6.2 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: 5c092c1e5c40e366ead491eb86c43a48 SHA-1: 07beef2ea9517408122438141b4a7bda0a0d9388 SHA-256: 7c08f5d73ea43a05c9eb9f07d37a17a834899a79f3860a85468d3cc768a76042

270 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains multiple critical heuristic firings related to known CVEs (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) which are exploited via embedded JavaScript. This JavaScript is designed to download and execute a second-stage payload from the provided URLs. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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)
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://sub1.softinternational.net/Cvssce/load.php?spl=pdf_new
- http://sub1.softinternational.net/Cvssce/load.php?spl=pdf_pack

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `b5aa767a541a46976532d5d3288743d6e76563f10f418f1e8521523d149bd21a`	pdf-javascript-stream	PDF /JS object 32 at offset 0x356	274 bytes
`javascript_obj0034_001.js` `0d7e402f93328d204812efe911d252c5e9190e52448199f0666bf43caea53802`	pdf-javascript-stream	PDF /JS object 34 at offset 0x44F	375 bytes
`javascript_obj0036_002.js` `6283aa7cdd598b902bd1586106e3a9b327402fc6bbe9fa728e9efb65a752d05d`	pdf-javascript-stream	PDF /JS object 36 at offset 0xBC	254 bytes
`legacy_pdfkit_stage_000.js` `22a6a208648dff6c065cc69c8b36dd18ce75f6c4d5faa906ccd32de67f9d364b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x597	1694 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `0c9eb77f8a95e6adabe2102d904fd2e0b695f1892794bbc12ec0dc79d2a3e7e6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xB56	1854 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `2c778b45703aec0e461dc4e723d4e9677a9d407c1d3f906f42412dcd32eef508`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x10F1	3046 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.