Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa83ccb67f05274e…

MALICIOUS

PDF

39.3 KB Created: 2020-04-07 22:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: c1b7b1acda99c156edadbb7a229cfeab SHA-1: 017a9455fae85455001d0c539ac8c72ab6d9f0e3 SHA-256: aa83ccb67f05274ef97e5f2d12efea7b716b960a6ad1e02bf5578364ccd1b304
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of external links to other PDF files hosted on various domains, a technique often used for SEO poisoning or to distribute malicious content. The ML classifier strongly indicated maliciousness. The embedded URLs are the primary IOCs, suggesting a link farm or redirection scheme. No scripts were extracted, limiting the analysis of direct payload execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://kimresine.ca/uploads/1/3/0/8/130814208/130814208.html#denon+dl110+moving+coil+cartridge
    • http://hapihawaii.net/uploads/1/3/0/5/130550970/jugoximezipo.pdf
    • http://www.bergcopy.com/uploads/1/3/0/5/130550782/ecdbd7f9ea3dd4.pdf
    • http://targettradingsystem.com/uploads/1/3/0/2/130270904/somutipajo.pdf
    • http://hassetthomeimprovement.com/uploads/1/3/1/1/131164095/xabutezepume-vilanu.pdf
    • http://lacharite.net/uploads/1/3/0/3/130313686/vemafenotegaga-wujabirasi-kemudaropim.pdf
    • http://alltheweirdabundance.com/uploads/1/3/0/6/130639488/xisovuzijimujaje.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a5f.bin
7bd18fdadcd4413e9a125c871fb3dab9672ca71f89af5d9899647c1deabd7879		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A5F 8660 bytes
font_01_sfnt_off00007bc0.bin
ddc6c38a5929b263b215a5b0c7aa8b1a409f146866f06980111f9f21a6232bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC0 16036 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.