Malicious PDF — malware analysis report

Static analysis result for SHA-256 228db4b2766ef8ea…

MALICIOUS

PDF

69.6 KB Created: 2020-11-24 05:09:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d244fb5ff01cf67198590e0cca35b7e6 SHA-1: 44a0590dee39a800b5745c9ff8cfe3f94646722f SHA-256: 228db4b2766ef8ea707be464a150b72b1f240cfb9be9673f4d45d4fae0d0daf3
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 https://trafficel.ru/123?utm_term=mtg+arena+new+formats PDF link annotation
    • https://besavikeneg.weebly.com/uploads/1/3/2/8/132815808/fosaravufe_donimomes.pdfIn PDF document text
    • https://kajefota.weebly.com/uploads/1/3/4/7/134766701/d2d8d63.pdfIn PDF document text
    • https://jepopiravu.weebly.com/uploads/1/3/4/1/134131497/xogil.pdfIn PDF document text
    • https://mamunazeve.weebly.com/uploads/1/3/0/8/130814121/bd6e6a399.pdfIn PDF document text
    • https://wadozivapo.weebly.com/uploads/1/3/4/5/134512268/gibapefapupapi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418368/normal_5fa8e20fb7fd5.pdfIn PDF document text
    • https://ramokazadi.weebly.com/uploads/1/3/4/4/134470245/ditigalatifede_finewutamezezi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dumupa/rhythm_rhyme_results_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bejokazemur/conclusion_of_online_shopping_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/lonozote/25717997882.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/rogujobavajegazugavewam.pdfIn 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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FB 5152 bytes
SHA-256: 3016785e01c3023ebd99904e9370ddb10386bc5ba82e4269aa2e2f565a4bcd2f
font_01_sfnt_off0000e48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 10888 bytes
SHA-256: b1776488beff8f4e5cd2d4b8c1ad24c330b72d4bd3a8b99900d58cda58700bd1