Malicious PDF — malware analysis report

Static analysis result for SHA-256 777d383faece3c5a…

MALICIOUS

PDF

553.2 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: a1fb17b9c76216ade8983cf8b52c53fb SHA-1: 4519cae4105a91f6569b0f4a37433f6de6190997 SHA-256: 777d383faece3c5a655d6b2aebed3906c6d687886ba2cbb2c745eccc2926796a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV with the signature Pdf.Dropper.Agent-7274289-0. Static analysis revealed a critical finding for an embedded PDF child with suspicious static findings, indicating it likely contains and attempts to execute further malicious content. The presence of embedded files and a remote GoTo action further supports its role as a dropper.

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-7274289-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7274289-0
  • 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
pinwheel_earth_555.pdf
d9a4d8b8d849c83f11e5deeb0c2ea28f1932863763753d6978e068491a196912		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 224084 bytes
pinwheel_earth_555_1.pdf
bf3121bfadebae3ad88dec975ff74ccc3f1b965354ec400383bb4fc93ea83f14		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 310593 bytes
pinwheel_earth_555_2.pdf
47f25baeaf5d81c694cd62a534b8ebf4af388171f8fbbd7f29f027b3d6d6c5bb		 pdf-embedded-file PDF EmbeddedFile object 244 at offset 0x1A9F1 397043 bytes
stream_019_off0001a021.bin
16973b7178dd0718dd27781f9380b8c628c8d9544bed7a96e61102468135c7b6		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A021 483574 bytes
objstm_0121_00.bin
58c9d6d3cd62e654433b1fcf3a9157dd433e5af1eb09968564791eab1852f536		 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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