Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b8742ba5e6f755…

MALICIOUS

PDF

37.3 KB Created: 2020-06-05 02:50:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e99d2726e3383d9a950e37ddde8f9a99 SHA-1: 16820c1eed853496320cb42e92b95a26767143f2 SHA-256: e2b8742ba5e6f755b35993dfea8bce17911c063e52e9e17f90a2c94487ee31c7
96 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to domains that appear to be part of a link farm. The document body, though partially corrupted, suggests a lure related to eating disorders. The ML classifier strongly indicated maliciousness, and the PDF_SEO_LINK_FARM heuristic confirms the presence of a mass external link farm. The primary intent appears to be directing users to potentially malicious or spam content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://rapidpermitreviewhawaii.com/uploads/1/3/1/0/131069961/131069961.html#como+hacer+un+triptico+de+trastornos+alimenticios
    • http://josephkalmowitzart.com/uploads/1/3/1/4/131483378/4b007b15b78f.pdf
    • http://growmenetwork.com/uploads/1/3/0/5/130589114/zalakoworagonunus.pdf
    • http://machinimaboost.com/uploads/1/3/0/4/130476114/128979ec71.pdf
    • http://eichon.co/uploads/1/3/0/5/130539672/4882931.pdf
    • http://lonestarboysofleather.net/uploads/1/3/1/4/131454932/sozusexewuronelu.pdf
    • http://rapidpermitreviewhawaii.com/uploads/1/3/1/0/131069961/terms.html
    • http://rapidpermitreviewhawaii.com/uploads/1/3/1/0/131069961/dmca.html
    • http://rapidpermitreviewhawaii.com/uploads/1/3/1/0/131069961/policy.html
    • https://nuluvojejuv.files.wordpress.com/2020/06/38279371218.pdf
    • https://gexefaduxoka.files.wordpress.com/2020/06/42453344818.pdf
    • https://vuzenaw.files.wordpress.com/2020/06/vojatorafug.pdf
    • https://kiwunagumif.files.wordpress.com/2020/06/dikilatodeba.pdf
    • https://batejade.files.wordpress.com/2020/06/16915685007.pdf
    • https://xojagowuzo543969804.files.wordpress.com/2020/06/kodubijuzinetobef.pdf
    • https://busamonavek.files.wordpress.com/2020/06/rigefogenekosivapa.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_off000064bc.bin
681202e6bc0cb41eb0615145b52413b34a081bd03668c8437b178a015269e92d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BC 11404 bytes

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