Malicious PDF — malware analysis report

Static analysis result for SHA-256 54270b2be40ca934…

MALICIOUS

PDF

590.7 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: 55b17790d332059fd9203e6128d101f1 SHA-1: 244d978f0fedf1ece9d3e906073f34abf09c6739 SHA-256: 54270b2be40ca93451805c1b0d88b5e53a54504eff1afefc00d866ecc41b6242
100 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded files and a remote GoTo action, indicating an attempt to redirect the user or load additional malicious content. The ML classifier strongly suggests maliciousness. The presence of embedded PDF streams and the PDF_GOTO_REMOTE heuristic point towards an exploit attempt, likely to download and execute a second-stage payload. No scripts were extracted, limiting the ability to determine the exact payload or persistence mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8662

Heuristics 4

  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • Remote GoTo action info PDF_GOTO_REMOTE
    PDF has GoToR/GoToE actions that reference sibling document files — typical of multi-part document bundles
  • 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 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
cigar_earth_723.pdf
631e07628751e98d276b11bda2629a8357c743d448ba4e4ab6e946e46b592259		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9E8 262466 bytes
cigar_earth_723_1.pdf
f3fa1f4b6f743e1f7606713174968894bec8cbe1d19a11ea78fd21fdaa9d0f53		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9E8 348926 bytes
cigar_earth_723_2.pdf
90fee4d737d621e1d48131946ad73e956f29f37f4cff4ef7c977ed7e252ae35f		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9E8 435446 bytes
stream_019_off0001a01e.bin
c649f50f651860025607affd7a5775d8b9293a0096b3c5c0f038214353de79d4		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A01E 522008 bytes
objstm_0121_00.bin
93720e78beb3d65a6e46575e29212429f36e1224f545a50c9d79e98f234c3f14		 pdf-objstm-decoded PDF /ObjStm 121 0 obj (inflated) 1111 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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