PDF malware analysis — malicious · ec1844d4b1a0a93b

MALICIOUS

PDF

152.9 KB Created: 2012-11-24 16:51:42 +01:00 Authoring application: Adobe LiveCycle Designer ES 9.0 (via Adobe LiveCycle Designer ES 9.0; modified using iText 5.0.6 (c) 1T3XT BVBA)

MD5: 95cf4ce39cf5f59c4cb8612ad5678080 SHA-1: 39fa5b3c72f3b4b1f846e80ca57f906c790b1625 SHA-256: ec1844d4b1a0a93b97259c01e5404fad34326b742f52d3b5ecc637bb2d7a4550

62 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file exhibits multiple indicators of malicious intent, including embedded JavaScript streams and embedded script payloads. The presence of XFA forms and AcroForm buttons suggests an attempt to create an interactive lure. The embedded JavaScript, specifically javascript_obj0133_000.js and javascript_obj0134_001.js, is the primary mechanism for executing malicious code, likely downloading and executing a second-stage payload. The document body was not parsable, limiting further analysis of the lure.

Heuristics 8

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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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
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/pdf/1.3/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xfa/promoted-desc/

Extracted artifacts 14

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0006.bin` `51886c02f18523c864de9517a248d92d526ae6888aaed7586d0f989b0fa381e8`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x4B03	163 bytes
`embedded_file_obj0007.bin` `267bc6bcdb8ed6e633f25fa68791bd9ceeb332247a849a3e3bfeee63b6d55c90`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x4BF2	2405 bytes
`embedded_file_obj0008.bin` `08cae221857a208d72230ddb7c80fec725beeff56378b5f3454acfed9f8738b1`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x4FE4	2921 bytes
`embedded_file_obj0009.bin` `1715982188cf22e2877bd76c2a70243d16c113fc64cc0c8020610ce5644399c8`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x5388	1535 bytes
`embedded_file_obj0010.bin` `2ebdd7efeaa1190ff6bad8cbd649b313e3969564018f204e7385b97c2fab1e19`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x5647	80 bytes
`embedded_file_obj0011.bin` `4a60a9864cdf7382475d51051a03fdc43b32c31eb508893ccfccece34957f9f1`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x56EF	56 bytes
`javascript_obj0133_000.js` `529357503ec67b623d2a12816cdeea62bd639f2b4ff4e568b01c96cc3f5bfc6f`	pdf-javascript-stream	PDF /JS object 133 at offset 0x7139	1363 bytes
`javascript_obj0134_001.js` `e985b5df65c8c3cf732a9074b575fbc594c1c7f0bccc0994182ec7e5c0f7308a`	pdf-javascript-stream	PDF /JS object 134 at offset 0x7315	902 bytes
`javascript_obj0135_002.js` `0ab3d232b2f2272b7039ee3e45d0be78ade06bb45327a799559ad4a592ef5a3d`	pdf-javascript-stream	PDF /JS object 135 at offset 0x746E	1169 bytes
`stream_001_off000001da.js` `26218a59363e858154224edbe3b445f354c4f341aa36b2291598a74c6c570668`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1DA	68830 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 long base64-like blob(s).
`stream_002_off000039b3.bin` `96f3b95ac590a24927aef9abf434358866dbefb8e8fe69b77b4b3dbd0e90e048`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x39B3	856 bytes
`font_00_sfnt_off00007f1e.bin` `1626e6329f65d0d35cdf751ec668ac4b8800d726707d01e7810bb8297d789dee`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x7F1E	94351 bytes
`font_01_cff_off00019727.bin` `77a0b6c3eea44eabe1eca27c9a3556172dbbac4102a91eebaaca2ab4e62f2f25`	pdf-font-stream	PDF embedded font (cff) at offset 0x19727	5600 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.42, consistent with packed or encrypted content.
`font_02_cff_off0001ad79.bin` `19164b1e8011f1baf8fcc59c104786acda8c6d3aadd1a7e0607059d9baecca17`	pdf-font-stream	PDF embedded font (cff) at offset 0x1AD79	3195 bytes

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