Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e9148e400f835fe…

MALICIOUS

PDF

80.9 KB Created: 2010-03-31 10:11:42 UTC Authoring application: Advanced PDF Repair: http://www.pdf-repair.com
MD5: 5e070be4f47c4233b3beece07cdef373 SHA-1: 78716cd89a0a3c3f131011eedd3835f70d36881b SHA-256: 7e9148e400f835fe9833013aaaa0fb897ec34b97c28db4b7e6d296daea5ff42a
100 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV with a 'Heuristics.PDF.ObfuscatedNameObject' signature, indicating obfuscation techniques were used. It also contains an embedded script payload and an embedded file, suggesting it's a dropper or exploit document. The presence of an embedded file and script points towards an attack pattern involving the exploitation of PDF vulnerabilities to execute malicious code or download further stages.

Heuristics 7

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • 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.pdf-repair.com
    • http://www.pdf-repair.com)/Producer(Advanced
    • http://www.pdf-repair.com)/ModDate(D:20100406171120+08
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://purl.org/dc/elements/1.1/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0002.bin
cbd31ccce271daa4bd5150e2213ec80b68b481e51470fcc6b5a28ee2541d44c0		 pdf-embedded-file PDF EmbeddedFile object 2 at offset 0x94 13431 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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