Malicious PDF — malware analysis report

Static analysis result for SHA-256 a27eb839a9c8f4f4…

MALICIOUS

PDF

5.9 KB Created: 2012-09-23 16:04:16
MD5: bddece4e8b831f5c71cd6ad1af3958d8 SHA-1: f8c12a6319cf8c8c660be3f48c669f7c99626bd2 SHA-256: a27eb839a9c8f4f4c728623fb0d3baacdf6e08bcf7573bdde2885c9004e4ac38
70 Risk Score

Malware Insights

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

The PDF exhibits multiple high-confidence indicators of maliciousness, including an embedded script payload and an embedded file. The ML classifier strongly flags this PDF as malicious. The presence of embedded files and scripts points towards a delivery mechanism for a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.

FilenameKindSourceSize
embedded_file_obj0007.bin
c09ae753ce4962d3d447f6ccdc05236eb9238277b66775a82f085f0fd265a84d		 pdf-embedded-file PDF EmbeddedFile object 7 at offset 0x20B 130 bytes
embedded_file_obj0011.bin
39659cc8daae618c03b8ffe9e905002b25275557ef8daf40e4b7636883b0f457		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x45D 86 bytes
embedded_file_obj0005.bin
e6c26a3478346d27e841ad49868ebf68bf4c6863b6750e8d60bda3c4c6f79876		 pdf-embedded-file PDF EmbeddedFile object 5 at offset 0x518 77 bytes
embedded_file_obj0009.bin
92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x5C1 56 bytes
embedded_file_obj0017.bin
d4d42ce0e2becf87abd24a70143a95b67bb3633a77c6bfce0204f49023ee7cd4		 pdf-embedded-file PDF EmbeddedFile object 17 at offset 0x6CA 201 bytes
embedded_file_obj0018.bin
862e46905cf1d73b6cfc2026c9a900d7df1663245116259ea4541009d829a856		 pdf-embedded-file PDF EmbeddedFile object 18 at offset 0xA1B 35823 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.