PDF malware analysis — malicious · 486b17f9892ba285

MALICIOUS

PDF

147.4 KB Created: 2010-03-31 12:55:11 -04:00 Authoring application: Adobe InDesign CS4 (6.0.4) (via Adobe PDF Library 9.0)

MD5: 23baec5de4b2a3b8845cd676226f44e3 SHA-1: 3c698f42a41fcb9d469f8917c00f26adfc335ceb SHA-256: 486b17f9892ba285d758ba1294f8ae3facaa5c2464255a5fe8204bea54cc0805

262 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains multiple indicators of malicious activity, including a critical heuristic firing for CVE-2010-2883, which is an Adobe Reader CoolType SING font exploit. The presence of embedded JavaScript and an OpenAction trigger further suggests the document is designed to execute arbitrary code upon opening. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obfuscated.

Heuristics 12

Adobe Reader CoolType SING font exploit — CVE-2010-2883 critical CVE likely CVE_2010_2883

PDF embeds a TrueType/OpenType font with an actual SING table and pairs it with JavaScript heap-spray shellcode. This matches the public Adobe Reader CoolType SING exploit shape for CVE-2010-2883.
Embedded PDF child has suspicious static findings critical PDF_EMBEDDED_CHILD_STATIC_TRIAGE

PDF contains an embedded PDF stream whose extracted child matches suspicious or malicious PDF heuristics. Wrapper PDFs are commonly used to hide the actual exploit or lure payload from scanners that do not recursively inspect attachments.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload (matched inside decoded stream)
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://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/g/img/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/sType/ResourceEvent#
- http://ns.adobe.com/xap/1.0/sType/ResourceRef#
- http://ns.adobe.com/xap/1.0/sType/ManifestItem#
- http://ns.adobe.com/xmp/InDesign/private
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/t/pg/
- http://ns.adobe.com/xap/1.0/sType/Dimensions#
- http://ns.adobe.com/xap/1.0/g/

Extracted artifacts 11

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0001_000.js` `5f24b407278784836b97304a6fe1d7431c61640aebc5fd20679de1789724a8f1`	pdf-javascript-stream	PDF /JS object 1 at offset 0xA	5050 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`stream_002_off0000b6ce.js` `d1dfd457a2fdd3cec4091f689f39b85b35666aa5599ef3a8d5f9a80d1e2ce105`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xB6CE	1042 bytes
`font_00_sfnt_off00001916.bin` `653ca03d0619ec307f08602bab763cada2b1ab61bd4da35c2bad69f6ae8e25f5`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1916	65932 bytes
`font_01_type1_off0000bb6f.bin` `c6bf78478c9c4dd5b3b86554d34c78f847f70af4118f9ff083c1fccf0e8e932b`	pdf-font-stream	PDF embedded font (type1) at offset 0xBB6F	97 bytes
`font_02_type1_off0000bdf7.bin` `b749644b3e758e7335900ab2e7499eaa64b3a946849f1f8a0948287bdd96763d`	pdf-font-stream	PDF embedded font (type1) at offset 0xBDF7	144 bytes
`stream_019_off0001a042.js` `26d7cb03cde8bf3944a5624c9fac13f09284e6934ee9aa1a70432d3067af5ab1`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1A042	49155 bytes
`objstm_0121_00.bin` `9e99b17369476c16e64b08480c525d90adb13e63805d21ffdbf1ec189c6c078f`	pdf-objstm-decoded	PDF /ObjStm 121 0 obj (inflated)	1250 bytes
`font_00_cff_off0000b46d.bin` `38d7d0627d6ef08fdb595be75f8f12752f3381fa7a1441ca8f76a5e76dc6e7b9`	pdf-font-stream	PDF embedded font (cff) at offset 0xB46D	609 bytes
`font_01_cff_off0000ba3f.bin` `5f3f348279f5218a0f3607c4a8e7c1b2190742072e04b58112191aa6b4235f52`	pdf-font-stream	PDF embedded font (cff) at offset 0xBA3F	886 bytes
`font_02_cff_off0000c1e7.bin` `7e5cb310f6cb7822b8a316192e8347738bb3f1d76fe954bdbf17623d2e87f2fb`	pdf-font-stream	PDF embedded font (cff) at offset 0xC1E7	3808 bytes
`font_03_cff_off0000d457.bin` `99bc093cddfa13f76f619bedeaf723ce24882a341f9686e35da3cad8dbab0a72`	pdf-font-stream	PDF embedded font (cff) at offset 0xD457	3669 bytes

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