PDF malware analysis — malicious · 17fba9ee44444937

MALICIOUS

PDF

335.0 KB Created: 2013-05-23 03:15:51 Authoring application: FPDF 1.52

MD5: 6a696d2dfafc92b23e54178f8bd26760 SHA-1: 9b99fea995d9f50f24a970e8664ec5c06c43595e SHA-256: 17fba9ee4444493734d477d13fae3cc31f2d929e1cb342600a216b346e72f8d5

70 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript that attempts to redirect the user to 'index.php'. The presence of a mailto link to 'info@katzen-versandhaus.de' suggests a potential phishing or social engineering attempt. The ML classifier also flagged this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.6252

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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules.
External URI low PDF_URI

PDF contains an external URL action
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00053312.bin` `3e752b0d751ebc5970fd0c7df8393aaf7dadd3d6becbdb8f0370a81963e21136`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x53312	342955 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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