Malicious PDF — malware analysis report

Static analysis result for SHA-256 6673532cc5ece4e1…

MALICIOUS

PDF

41.5 KB Authoring application: Scribus
MD5: 176cac426693938c2b7c95d8a6f2877b SHA-1: 579a05745f3ccead2bfed1adceef1f3153118c9d SHA-256: 6673532cc5ece4e157d9e8fb7acf3830e2b4d7faa0979f06f22b2eaa0b20bf99
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files hosted on different domains, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution through these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://jeffstyr.net/uploads/1/3/0/7/130740607/86482.pdf
    • http://mycrawfordcleaning.com/uploads/1/3/0/8/130814680/7fe51683cb.pdf
    • http://peelerapp.com/uploads/1/3/0/5/130550834/3693052.pdf
    • http://advance-it.net/uploads/1/3/0/6/130604508/130604508.html#formula+para+calculo+de+mtbf+y+mttr
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00001009.bin
f2959fae20e5431bfe33066969efb595410d38a241be098a4a74ecb3e5297531		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1009 10020 bytes
font_01_sfnt_off00005c93.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C93 16036 bytes

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