Malicious PDF — malware analysis report

Static analysis result for SHA-256 a376cefd7d6f7d14…

MALICIOUS

PDF

72.3 KB Created: 2021-02-06 01:31:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 727b414e67a4ef8db9c7a5e0d3b9f653 SHA-1: d08f8c368849993ea949d0386a22225ff9eccc81 SHA-256: a376cefd7d6f7d145a18c6e8bc3a05caba2af5fd089bca3cfb83b55f959da3f4
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://druttle.ru/wb?keyword=escape%20room%20level%20225%20answers PDF link annotation
    • http://devlp.design/visosaxosogozasisaphjsmh.pdfIn PDF document text
    • http://shoppingyxplus.xyz/ccna_routing_and_switching_complete_study_guide_200-1254p7kc.pdfIn PDF document text
    • https://jofufibiwew.weebly.com/uploads/1/3/5/3/135347649/133a372.pdfIn PDF document text
    • https://zomerasojukoluw.weebly.com/uploads/1/3/4/7/134769652/965812.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448735/normal_5fe38e358ff01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369503/normal_5ffb5b0a4f3fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373985/normal_5fe78eba3272d.pdfIn PDF document text
    • http://wwnews.site/peugeot_307_parts_cataloguewr1au.pdfIn PDF document text
    • https://zakesulukagog.weebly.com/uploads/1/3/4/4/134493448/643922bae40.pdfIn PDF document text
    • https://gabodubelekopo.weebly.com/uploads/1/3/4/3/134356924/1396b51bbf.pdfIn PDF document text
    • http://lavka-karamel.ru/tableau_budget_familialcej46.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/kovezodepugov/xarobotegutejotijadefusof.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/fortnite_season_4_week_10_challenges_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/27839759789.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/ais_annual_report_2013.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_off0000df91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF91 5444 bytes
SHA-256: 4786623f97eae13b76bac258d831ec39edfaa03546709c9b0ef84630ee0cdf45
font_01_sfnt_off0000f225.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF225 10088 bytes
SHA-256: b50c33a6cb2923914811243791857433fa0683ccef766a8254a3d2875216ee89