PDF malware analysis — malicious · fa23f7b6bf50264c

MALICIOUS

PDF

334.2 KB Created: 2010-02-23 12:29:53 -08:00 Authoring application: Acrobat PDFMaker 7.0 for Word (via Acrobat Distiller 7.0 (Windows))

MD5: 8b953be49251101f5f67021a33792529 SHA-1: 5f6fde39299586e73b510b0ec403f988a5b1be1f SHA-256: fa23f7b6bf50264c4e85ff6d980395bb4a1f36d3047867540845feadaa2db6a9

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was identified as malicious due to the critical heuristic firing for an embedded Windows executable payload. The PDF also contains JavaScript and XFA form elements, which could be used to trigger the execution of the embedded payload. The primary IOC is the embedded executable file itself, which is likely the second-stage malware.

Heuristics 8

Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD

PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
Secondary embedded PDF body has suspicious static findings critical POLYGLOT_CHILD_PDF_STATIC_TRIAGE

A valid PDF body was found at a nonzero offset inside another container and its carved contents matched PDF exploit or lure heuristics. This catches polyglots where the top-level magic routes to ZIP/OLE while a PDF reader or downstream parser opens the hidden PDF payload.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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. (matched inside decoded stream)
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. (matched inside decoded stream)
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic (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://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/pdfx/1.3/
- http://ns.adobe.com/photoshop/1.0/

Extracted artifacts 15

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0002.bin` `c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x19FA	85 bytes
`embedded_file_obj0003.bin` `0cae1494b9c99505bf126e683a1a8be36bc8d5e793ab829e266d6e2fd62ccac3`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x1AAC	1466 bytes
`embedded_file_obj0004.bin` `1b57e7c1e4bc1f8daf7cdf9c6223b19580c93789063a99232ed1cb040470df13`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x1D6B	9148 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`embedded_file_obj0005.bin` `f47c3dc8c4eeb64abc2cc332be719add15af6ce6dfdcdb477c08a1aefdbe7477`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x290F	11740 bytes
`embedded_file_obj0006.bin` `226eeacc5eecef2a05ca480f144ff6936594e20b5c7672e8f29f25c8bea65a56`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x2AD7	2928 bytes
`embedded_file_obj0007.bin` `4cb349134bdb5f1a1c03281df9b53128ebe947f235398a912a4f0a9f638b24d5`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x2E44	200 bytes
`embedded_file_obj0008.bin` `d51b9fc28b592405fb598e711d1495e1421571073bc2e8542d55389768716c06`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x2F37	835 bytes
`embedded_file_obj0009.bin` `e65f1e07bc965092b3153e64a1e8777a909cc47a98c0e2a10d38c47def2e6652`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x3110	291 bytes
`stream_002_off000003e1.js` `f574e4d51594d1a8fd22e125b109b827c437aa898edc78babb62dbb93f8744f8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3E1	1532 bytes
`stream_003_off000005cc.js` `4a1aca004cf20431c9a66dce85404a6411a54d881a6c257882260ffc972a13eb`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5CC	870 bytes
`stream_008_off0000112a.bin` `8358d835225babc82acbcbbf2cb07512b8fb3772c5b46ff5956d2c6d02da8c39`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x112A	3024 bytes
`embedded_pdf_00010737.exe` `684d56f92afb01638ac80ce43a0d95bc046deed3e9bb4dc58acf9f4383279801`	embedded-pe	PDF raw stream PE payload at offset 0x10737	8200 bytes
`font_00_sfnt_off00025d4e.bin` `491cf0647110f094ac3b4355805c008b0475302ea4ffa2fc70dfb3bc7ea70982`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x25D4E	198004 bytes
`embedded_pdf_0002062a.exe` `46c0477cc86a36817eae9d2e7d62ee7f12e0b796a9aecee616f49c93deb11759`	embedded-pe	PDF decompressed stream PE payload at offset 0x2062A	104773 bytes
`polyglot_child_pdf_off0001994f.pdf` `a9396554b8f822a56670ed1bd550a3bd72e4136a36cc9a4e2b0801829ba35c2f`	polyglot-child-pdf	Secondary PDF body inside pdf container at offset 0x1994F	237433 bytes

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