PDF malware analysis — malicious · f63f36884f0657d9

MALICIOUS

PDF

6.0 KB Created: 2012-09-23 16:04:16

MD5: b7d328859adbda8ad139342dd7257be9 SHA-1: fa9d1885e1d9cb8a0a892bfefdfe4e52385193e8 SHA-256: f63f36884f0657d977e3a64146e19a32738234681e59bd785eb3cc4388c2debc

130 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1566.001 Phishing: Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating it contains an exploit. It embeds multiple files, with one particularly large file (embedded_file_obj0018.bin) likely serving as the primary payload. The presence of PDF-specific exploit heuristics further supports this attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 6

ClamAV: Pdf.Exploit.Gen-259 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Gen-259
Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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.

Extracted artifacts 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0007.bin` `c09ae753ce4962d3d447f6ccdc05236eb9238277b66775a82f085f0fd265a84d`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x20B	130 bytes
`embedded_file_obj0011.bin` `a1784eda0a2478dd9f9965d9b59d5718146274c8733f5e0d9b09879f34e75eaf`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x48F	151 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`embedded_file_obj0005.bin` `e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x57A	77 bytes
`embedded_file_obj0009.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x623	56 bytes
`embedded_file_obj0017.bin` `d4d42ce0e2becf87abd24a70143a95b67bb3633a77c6bfce0204f49023ee7cd4`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x72C	201 bytes
`embedded_file_obj0018.bin` `d470219bff7271cf2ef23133be17352c401e8e414e64fe9cd93e75fd60d45423`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0xA7D	35631 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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