PDF malware analysis — malicious · a52198d7b254d5b3

MALICIOUS

PDF

711.2 KB Created: 2011-11-24 10:04:13 +00:00 Authoring application: Microsoft® Word 2010

MD5: 4a9f94609c2b3fcb593902f37025ef50 SHA-1: 0042a055b4b932804f555892f604481f75ba0e63 SHA-256: a52198d7b254d5b32b8b17831ee3cbf484461025ec64241994885545081505ee

170 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file was identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-35901. Static analysis revealed embedded files and a remote GoTo action, indicating an attempt to deliver or execute further malicious content. The presence of multiple embedded artifacts strongly suggests this PDF is a dropper or exploit container.

Heuristics 5

ClamAV: Pdf.Exploit.Agent-35901 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35901
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
Embedded PDF child has suspicious static findings high 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

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0013.bin` `01061aea8736c4ed563536e8400a7cab6cd2635966b3d6111b8c7aa7200aa9db`	pdf-embedded-file	PDF EmbeddedFile object 13 at offset 0x9BF	15550 bytes
Detection ClamAV: Pdf.Exploit.Agent-35901 Obfuscation or payload: unlikely
`embedded_file_obj0402.bin` `f8d7d640f6b5b45b627146677207d7127cd449d111f8e45dad60b616f8987fa2`	pdf-embedded-file	PDF EmbeddedFile object 402 at offset 0x3ED80	18215 bytes
Detection ClamAV: Pdf.Exploit.Agent-35901 Obfuscation or payload: unlikely
`stream_007_off00011973.bin` `fbb1711d84afaf9e04e4bfd7d16ef99dceea2887d9db601763a52828af3baf3e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x11973	199928 bytes
`embedded_file_obj0402_1.bin` `2fb1f0ed2bbb0a6fb3ca071c602ed710ef9dd03d9358f4eafdef128c66c8580b`	pdf-embedded-file	PDF EmbeddedFile object 402 at offset 0x3ED7C	283040 bytes
Detection ClamAV: Pdf.Exploit.Agent-35901 Obfuscation or payload: unlikely
`embedded_file_obj0402_2.bin` `a01a615255d65b54de7c29f84a52d4f831633b826298bd0ccd5e518aedfe60b2`	pdf-embedded-file	PDF EmbeddedFile object 402 at offset 0x3ED7D	505534 bytes
Detection ClamAV: Pdf.Exploit.Agent-35901 Obfuscation or payload: unlikely

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