PDF malware analysis — malicious · 80254a6d122258a5

MALICIOUS

PDF

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

MD5: e8c30481af1e52b7452c5a3c16bc844d SHA-1: 566cd926ee6021f9881503483a560857baaaec2e SHA-256: 80254a6d122258a539e9700d3f4bb4555e8a2c32448841d9134d6501c6643869

132 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution

The PDF was flagged as malicious by multiple engines, including a critical ClamAV detection and a high ML score. It contains embedded script payloads and multiple embedded files, indicating an attempt to deliver a secondary payload. The presence of XFA forms and embedded files suggests a complex exploit chain.

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` `1d3badc9f87454905e198563a612f74ecf4d2bc0e62f33b04dd6ec86ddfb4ced`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x4A3	175 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 0x5A2	77 bytes
`embedded_file_obj0009.bin` `92a3ce61d783e15932b5de127ce45a9b4c2f98f4da2453f65241573c1dda808a`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x64B	56 bytes
`embedded_file_obj0017.bin` `d4d42ce0e2becf87abd24a70143a95b67bb3633a77c6bfce0204f49023ee7cd4`	pdf-embedded-file	PDF EmbeddedFile object 17 at offset 0x754	201 bytes
`embedded_file_obj0018.bin` `2c84a85704f79c6ac3044065ce71116389efb681f2ed1b56ecf57f55f7e35067`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0xAA5	35727 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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