PDF malware analysis — malicious · 7cf22909c61bf6ab

MALICIOUS

PDF

5.8 KB Created: 2012-09-27 20:19:18

MD5: 2b6a7ddcd2eb7096e7949bbaf9bce028 SHA-1: 516ddbe8036c56369c46464f7db2f3672f6d80a5 SHA-256: 7cf22909c61bf6abd79aba7e6d1b2cbff850189d39e4f7d57408518c163771cc

72 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF was flagged as malicious by an ML classifier with high confidence. Heuristics indicate the presence of an embedded script payload and an embedded file, suggesting it's designed to deliver further malicious content. The embedded file 'embedded_file_obj0008.bin' is likely the primary payload or exploit delivery mechanism.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0002.bin` `c09ae753ce4962d3d447f6ccdc05236eb9238277b66775a82f085f0fd265a84d`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0x1FD	130 bytes
`embedded_file_obj0005.bin` `f6a54c51b37d1ae023ec9a7117017183ce122527af8c21cde328587302c71a74`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x2D1	128 bytes
`embedded_file_obj0006.bin` `d4d42ce0e2becf87abd24a70143a95b67bb3633a77c6bfce0204f49023ee7cd4`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x5CC	201 bytes
`embedded_file_obj0008.bin` `5f14b30b3b0b24e855c14e050ef108141ad1fbd1909ab872398a25c5ecc864be`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x8BB	35267 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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