Malicious PDF — malware analysis report

Static analysis result for SHA-256 45195bd1262be3da…

MALICIOUS

PDF

553.3 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: 0f9890b846994d7c9efb51e32d7927f6 SHA-1: bdd362c298d2769b897984ca9c3638a1b845e80e SHA-256: 45195bd1262be3da3e5cbc8fad53b38cccd6fd8d9edca8bff23e5b63678482da
160 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Dropper.Agent-7255945-0' and a machine learning classifier indicated a high probability of maliciousness. The presence of embedded PDF files and remote GoTo actions suggests an attempt to load external or secondary malicious content. The ML_NYX_PDF_MALICIOUS heuristic firing further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8662

Heuristics 5

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7255945-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7255945-0
  • 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
mayall_jupiter_983.pdf
774fd7716d8fc9e64c46cafa39ded1502939ec7e3fa918d4cb697f96f0fd7339		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 224128 bytes
mayall_jupiter_983_1.pdf
cc0e7450516316162dd99cd9d86ceb9bf0456145bef22ffb66a3591068b17de8		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 310637 bytes
mayall_jupiter_983_2.pdf
258e0a2182ddc718743235ac43a74d8d471067b3aee6b0bc4573388fcc565819		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 397083 bytes
stream_019_off0001a021.bin
5c5f3fb27344c41407187f78e3512dde5cd2169a71860cfb6eb573ddfd700122		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A021 483619 bytes
objstm_0121_00.bin
ddfd3f939e39cd612d42845b54ebfe9fa55bb8c90cccda9f51ae9f5b42eeb505		 pdf-objstm-decoded PDF /ObjStm 121 0 obj (inflated) 1120 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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