Malicious PDF — malware analysis report

Static analysis result for SHA-256 9233f92a5d833731…

MALICIOUS

PDF

35.8 KB Created: 2020-04-16 01:54:50 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: de6e50c915a9a5e3b69746054dee46b0 SHA-1: a8b4dee43baa660d11e8797fdaca0824aff949a7 SHA-256: 9233f92a5d833731f64aa69038a1283f29837aba79437a060be1c6736dd7b016
94 Risk Score

Malware Insights

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

The PDF contains a large number of external links to various domains, many of which appear to be part of a link farm designed for SEO manipulation. The ML classifier strongly indicated maliciousness. The primary attack pattern involves redirecting users through these numerous, likely compromised or malicious, PDF hosting sites.

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://sdsufiji.com/uploads/1/3/0/2/130289587/130289587.html#academic+writing+course+pdf
    • http://campbutterflybella.org/uploads/1/3/1/3/131383251/nokogonudov.pdf
    • http://reeceies.net/uploads/1/3/0/7/130740143/repivobomo.pdf
    • http://gjs.as/uploads/1/3/0/3/130313391/dazudeza-xetodujotuda-nazobod.pdf
    • http://newmandiamonds.com/uploads/1/3/1/3/131398385/saxidorapakuwa-fajakikaximeno-jedamabereludib-pezatib.pdf
    • http://sensoryexperienceforwomen.com/uploads/1/3/1/4/131454899/ritozo.pdf
    • http://hummingbirdlaneorganicflower.net/uploads/1/3/0/6/130604045/wavopajuxezizu.pdf
    • http://stepmomsassociation.com/uploads/1/3/0/3/130379651/0ae22.pdf
    • http://generationgreta.com/uploads/1/3/0/5/130590561/7d49082ca7698.pdf
    • http://homeautomationlasvegasnv.com/uploads/1/3/0/7/130776152/60746d117e9.pdf
    • http://evergreenehikes.com/uploads/1/3/1/4/131453684/lovega.pdf
    • http://thewestgroup.info/uploads/1/3/1/4/131437394/3da6fc98900.pdf
    • http://certifiedemployeehandbook.com/uploads/1/3/0/6/130605278/7871151.pdf
    • http://sensoryexperienceforwomen.com/uploads/1/3/1/4/131454899/ritoz
    • 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_off00006581.bin
ead57fddab23abd7ae53b9ab440f5d8c7d9b829e42dedb8afa2bf4b6cadee8dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6581 7176 bytes

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