Malicious PDF — malware analysis report

Static analysis result for SHA-256 94fd93f5df036965…

MALICIOUS

PDF

40.8 KB Created: 2020-04-08 13:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: a64524aceee06144ab7bd471b9dd42bd SHA-1: 8f0e2748ad29ec2c6b1d82c49bd6a75574bae9be SHA-256: 94fd93f5df036965fb4575cc9daa4f06b0bd76869e295c25b1c42c229d4bc370
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to other PDF files with numeric slugs. This pattern is indicative of a link farm or SEO poisoning attack, designed to manipulate search engine rankings. The document body itself contains a title related to matrix inversion, which is likely a lure to attract clicks to these external resources. No scripts were extracted from this sample, limiting the ability to determine further malicious actions.

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://onkoyoga.com/uploads/1/3/0/5/130551391/130551391.html#inversa+de+una+matriz+metodo+cofactores
    • http://inourworld.net/uploads/1/3/0/7/130740489/8759068.pdf
    • http://dragonflyfloralrentals.com/uploads/1/3/0/9/130969644/3c8836cf12c5b5.pdf
    • http://23percentclothes.com/uploads/1/3/0/3/130312968/af9634286274f5e.pdf
    • http://bimaristan.org/uploads/1/3/0/5/130539078/7214811.pdf
    • http://educationalroboticsreview.com/uploads/1/3/0/2/130291996/ridosuvawotozut.pdf
    • http://atxpez.com/uploads/1/3/0/7/130776265/sivozeka_nupovava.pdf
    • http://tahawushomesteadbrewery.com/uploads/1/3/0/5/130539054/2325e75c31107.pdf
    • http://jestersdesigns.com/uploads/1/3/0/4/130488698/9632620.pdf
    • http://goaheadindulge.com/uploads/1/3/0/5/130551126/a2bb4b5.pdf
    • http://avhirelondon.org/uploads/1/3/0/5/130551164/dunipajox.pdf
    • http://manitoulinisland.info/uploads/1/3/0/9/130969944/pikoravogure.pdf
    • http://emilyburdettphotography.com/uploads/1/3/0/9/130969717/c70fba14.pdf
    • http://sweetlyhosted.com/uploads/1/3/0/6/130604675/jupozenigakubebo.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_off00007412.bin
e8359a246948a18e6468a80da88218de8b15b155371b8b9f1b43aa58229203d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7412 9312 bytes

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