Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac7ba7a50d5078d9…

MALICIOUS

PDF

37.2 KB Authoring application: Scribus
MD5: cb0a59d5c89ffcd7cf40a54170001631 SHA-1: e3c07140948e17041f865da05d2b1ced1a08a599 SHA-256: ac7ba7a50d5078d91482876ade4d10254133cdfb1b29b7cfa64370866d28b0fe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a large number of embedded URLs, identified as a PDF SEO link farm. The primary heuristic firing indicates a malicious intent related to phishing. The embedded URLs, such as http://revirg.com/uploads/1/3/0/6/130605168/gepofajetuxu_dozizezemozujox_wefamedapo.pdf, are likely used to direct users to malicious content or for SEO manipulation. ClamAV detection further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://revirg.com/uploads/1/3/0/6/130605168/gepofajetuxu_dozizezemozujox_wefamedapo.pdf
    • http://nectr.ca/uploads/1/3/0/2/130289246/cbc5b2dd.pdf
    • http://mywelby.org/uploads/1/3/0/4/130483300/reluxet.pdf
    • http://meridianintranet.com/uploads/1/3/0/6/130620302/3601006.pdf
    • http://dapperevents.com.au/uploads/1/3/0/7/130739200/memenanajeta-supodat-petawojofitoni-xawuranefidov.pdf
    • http://nobuhotelmarbella.devsite-1.com/uploads/1/3/0/5/130589121/130589121.html#acute+rheumatic+heart+disease+meaning

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000010c0.bin
9971406b5b9f1509e72ac759cc8ae7648bd494f4642f5552bdc37a40cae601e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0 8156 bytes

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