PDF malware analysis — malicious · 9b23b26ef46349e2

MALICIOUS

PDF

1.95 MB

MD5: 7bb97ff9146a79e3cee795da0c8a4ff1 SHA-1: 99337345bb48e5105829157341d3c0d839060fe9 SHA-256: 9b23b26ef46349e2d0aead498b731f6906ccbd438dc0cb0fd7e619672bc36113

496 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link T1566.001 Spearphishing Attachment T1204.001 Malicious Link T1566.002 Spearphishing via Service

This PDF document contains embedded JavaScript that is heavily obfuscated using a character table indexing technique. The heuristics indicate exploitation of multiple CVEs related to PDF JavaScript execution, specifically CVE-2009-4324 (media.newPlayer), CVE-2009-0927 (Collab.getIcon), CVE-2007-5659 (Collab.collectEmailInfo), and CVE-2008-2992 (util.printf). The primary function of the obfuscated script appears to be downloading and executing a second-stage payload, as indicated by the 'char_table_stage_000.js' artifact and the ClamAV detection 'Pdf.Exploit.Agent-36749'.

Heuristics 12

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)
CCITTFaxDecode + active content — LibTIFF CVE-family indicator high CVE related PDF_CCITT_CVE_2010_0188_RELATED

PDF uses /CCITTFaxDecode together with JavaScript, XFA, or RichMedia indicators. This matches the delivery pattern for Adobe Reader LibTIFF/CCITTFax parser exploit families, including CVE-2010-0188, but does not prove the exact malformed TIFF primitive.
ClamAV: Pdf.Exploit.Agent-36749 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36749
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.
Character-table JavaScript eval stager high PDF_JS_CHAR_TABLE_EVAL_STAGER

PDF JavaScript reconstructs an exploit stage by indexing into a small character table, appending hundreds of one-character fragments, joining the array, and evaluating the result. This static fallback fires only after the bounded decoder recovers an exploit-like stage, so it catches this obfuscation even when no single CVE API signature is available.
Suspicious extracted artifact high 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.
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.
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://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/photoshop/1.0/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/sType/ResourceRef#
- http://purl.org/dc/elements/1.1/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `8fdfaab66d8e21af1af8b295115ac07d3c67f2954c0618d877e9eaa7384d98a3`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2C2	89349 bytes
Detection ClamAV: Pdf.Exploit.Agent-36749 Obfuscation or payload: unlikely
`char_table_stage_000.js` `67d93f572c9ea05f15cd861d7c563121f7d77500e0d28a1174b02cf9efeba885`	deobfuscated-js	char-table indexed JavaScript (PDF /JS object 76) at offset 0x2F1	3900 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`font_00_sfnt_off0019c9e8.bin` `ffdbb8636ffc87e91732d2effab3f80ab8dd71dd411fe74359152bd24779e6f7`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19C9E8	6440 bytes
`font_01_sfnt_off0019e53c.bin` `b78bb99c825d98346f80db367507bc14e2a6f628160145a869160bda7feb61ed`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x19E53C	17700 bytes
`font_02_sfnt_off001a192e.bin` `7996c6862571d67f754df1ba005d6c0ef6139da13a646ac94030f81e7d654921`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A192E	4052 bytes
`font_03_sfnt_off001a25e4.bin` `1fe440ef9de909a2158bb06efce289b9edfa6e3063874b86cbd571a580692391`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A25E4	21032 bytes
`font_04_sfnt_off001a655f.bin` `7d3757086da09ed42f0249c715ec2c8ee7253bd3d306952aa2fe712e4948c0d4`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A655F	7976 bytes

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