Malicious PDF — malware analysis report

Static analysis result for SHA-256 de466b05eb8d1d49…

MALICIOUS

PDF

41.2 KB Created: 2020-03-25 08:21:06 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: d40b510f40265095d7cb18c8d18efdd7 SHA-1: 428093e69b06ec0c37454c99d8125b65c0bfd8d2 SHA-256: de466b05eb8d1d49bfcb691b48d6b6f856b98debc40ccead1d9dfeb997c2b874
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though partially corrupted, contains a URL that points to a specific product, suggesting a lure. The primary function appears to be directing users to a multitude of other PDF documents hosted across various domains, likely for SEO manipulation or to serve as a distribution point for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://stephenssourcinggroup.com/uploads/1/3/0/4/130490338/130490338.html#bersa+thunder+380+holster+amazon
    • http://ninety-percent.com/uploads/1/3/0/6/130604375/gipabipire.pdf
    • http://eckertearthmoving.com/uploads/1/3/0/5/130539078/jolisapogi.pdf
    • http://westchesterwebsitedesign.com/uploads/1/3/0/6/130621814/fenebokotejimobutesu.pdf
    • http://drylakewellness.com/uploads/1/3/0/3/130379146/lufijunilojote.pdf
    • http://biggerbettermalemassage.com/uploads/1/3/0/6/130621905/7081e.pdf
    • http://orrerysystems.net/uploads/1/3/0/6/130603909/kodonite.pdf
    • http://freemove-in.com/uploads/1/3/0/3/130313230/muwawiposamubaz-logama.pdf
    • http://international-companies.com/uploads/1/3/0/7/130776823/refisefipete.pdf
    • http://veganbyrenee.com/uploads/1/3/0/7/130738819/a7d15ad5.pdf
    • http://thesunsetswithoutyou.com/uploads/1/3/0/6/130640116/df516892aa1965.pdf
    • http://mta-sts.mail.hicksandsonsjunkremoval.com/uploads/1/3/0/6/130620745/wixoxaz.pdf
    • http://morealestatebook.com/uploads/1/3/0/2/130291702/989322.pdf
    • http://runforestrunclub.com/uploads/1/3/0/2/130289651/fejopeparurodoz-jemasikol-pabisoreluve-sukefil.pdf
    • http://7-wealth.com/uploads/1/3/0/6/130604862/cfde21.pdf
    • http://stokemodelclub.co.uk/uploads/1/3/0/4/130488469/4542483.pdf
    • http://www.alex82.com/uploads/1/3/0/6/130621072/fejumemonutes.pdf
    • http://whenapp.com/uploads/1/3/0/7/130775306/vusepomi.pdf
    • http://northcountryhomeinspection.com/uploads/1/3/0/2/130289504/6836364.pdf
    • http://tommystable.com/uploads/1/3/0/6/130622061/pisezitu.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_off00007576.bin
f0b37133041dc0fdf59836d93fa1d514982ed3c30ada6d6f2665260166f314a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7576 8480 bytes