Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a4de54db0975b4…

MALICIOUS

PDF

96.8 KB Created: 2020-04-15 21:09:54 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bc52441073b1c2ec8bfc72486787a7ac SHA-1: beaeae2d2509465a071dca3787b23085d7c8b509 SHA-256: e3a4de54db0975b4bdfbf4a696ea05d84b1955ebcb50e6172926146e6984c9e2
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files on unrelated domains, indicating a link farm for SEO manipulation. The primary URL, http://triumphontrails.com/uploads/1/3/1/3/131378814/131378814.html#boy+scout+uniform+store+knoxville+tn, suggests a lure related to 'boy scout uniform store knoxville tn'. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the extensive link farm and the nature of the embedded URLs suggest a campaign to drive traffic to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://triumphontrails.com/uploads/1/3/1/3/131378814/131378814.html#boy+scout+uniform+store+knoxville+tn
    • http://rpk-concrete.com/uploads/1/3/0/5/130588286/aef1c126088.pdf
    • http://thewhitehouseproductions.com/uploads/1/3/0/5/130550743/7230193.pdf
    • http://bhmanz.com/uploads/1/3/0/6/130621045/9549007.pdf
    • http://cherryjukebox.com/uploads/1/3/0/4/130488295/17422d8e3e4.pdf
    • http://cottageandcoastmarket.com/uploads/1/3/0/6/130605509/2533542.pdf
    • http://rockstarconsulting.net/uploads/1/3/0/7/130738725/09a5b.pdf
    • http://casacesarcomercial.com/uploads/1/3/1/4/131436972/lewezagijumaxa.pdf
    • http://madskills.nz/uploads/1/3/0/9/130969184/jawis.pdf
    • http://crchog.org/uploads/1/3/0/6/130621035/6476812.pdf
    • http://eaglefordrail.com/uploads/1/3/0/5/130547884/ponepipefeparalodaxu.pdf
    • http://bsp500.org/uploads/1/3/1/4/131453455/nezonagusim.pdf
    • http://garrettotahair.com/uploads/1/3/1/4/131438629/0fe803e.pdf
    • http://miximini.com/uploads/1/3/1/3/131382239/bisubawujorobol.pdf
    • http://thepurposeprovoker.net/uploads/1/3/0/5/130551174/kapugibafijewe.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015cac.bin
533c1ee2db11aac91433f02c13a7cef4b75e60ee75f21e3da005ea32c372b673		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15CAC 6192 bytes

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