Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea56b1122f605642…

MALICIOUS

PDF

65.3 KB Created: 2020-03-11 10:33:08 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: a5b9d273d60714dea86fb18f6c491d53 SHA-1: 92c95bced5fd98077ccc8c228c2cf6053bb9b8a5 SHA-256: ea56b1122f6056421175f420d99041e5a89964bd6079191c4a5056ff582f2be5
96 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDF files hosted on various domains. This behavior is indicative of a link farm or SEO spam campaign. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves redirecting users to a network of seemingly unrelated websites, likely to generate traffic or host 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://three-ps-in-a-pod.com/uploads/1/3/0/7/130739936/130739936.html#nrsv+catholic+bible+amazon PDF link annotation
    • http://europeandiamondlabs.com/uploads/1/3/0/8/130873856/setibezijivopozejis.pdfIn PDF document text
    • http://tigermothmedia.co.uk/uploads/1/3/0/7/130776526/kigunuzop.pdfIn PDF document text
    • http://www.livingthecrownlife.com/uploads/1/3/0/9/130969571/lutafegavamugem-gawewid.pdfIn PDF document text
    • http://bogolist.com/uploads/1/3/0/5/130589083/2be9af8c8189.pdfIn PDF document text
    • http://amodernplace.com/uploads/1/3/0/7/130776416/506cca2f66d1da7.pdfIn PDF document text
    • http://efecto-digital.com/uploads/1/3/0/5/130588497/jewazufu_jufamupaxekepi.pdfIn PDF document text
    • http://www.benjohnsontragedy.com/uploads/1/3/0/5/130542863/404401c1c5dd7e6.pdfIn PDF document text
    • http://breckenridgeconstructioninc.com/uploads/1/3/0/3/130313002/morifewiz.pdfIn PDF document text
    • http://victoriahomeinspection.ca/uploads/1/3/0/7/130739646/e420d.pdfIn PDF document text
    • http://patusher.com/uploads/1/3/0/7/130740242/webotobedorakiler.pdfIn PDF document text
    • http://classicmassagestudio.com/uploads/1/3/0/8/130874394/fixekefuxogorog.pdfIn PDF document text
    • http://mrfixitchicagoland.com/uploads/1/3/0/6/130605124/lapimuzudevu.pdfIn PDF document text
    • http://odd-youth.com/uploads/1/3/0/7/130776887/jegovolonusofa.pdfIn PDF document text
    • http://solebait.com/uploads/1/3/0/6/130620858/zavavisazesanuzifek.pdfIn PDF document text
    • http://citizensmedicare.org/uploads/1/3/0/8/130815582/1393339.pdfIn PDF document text
    • http://sachtesoch.com/uploads/1/3/0/6/130621022/1730910.pdfIn PDF document text
    • http://dirtylittleclaws.com/uploads/1/3/0/6/130621640/9464434.pdfIn PDF document text
    • http://www.twistedsculpture.com/uploads/1/3/0/3/130313149/4574580.pdfIn PDF document text
    • http://bluelinemartialarts.com/uploads/1/3/0/6/130604225/potavoket-woxixifim-wupem-xedonuworison.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA3F 9388 bytes
SHA-256: 1fa3fb8d99a2fc0451b9640c32e599dd4f9f92b9fce7c3fc4c71779008f8fd81
font_01_sfnt_off0000eda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 2652 bytes
SHA-256: e2f1373bf3d70a40ff4276a486f0a1d2d32154e4f45ad1243a44c3d3b7d91cea

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