Malicious PDF — malware analysis report

Static analysis result for SHA-256 548769631faf9ec6…

MALICIOUS

PDF

75.8 KB Created: 2021-01-29 11:18:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b4e50f83600ef9faeb8a8c0f27f34bc6 SHA-1: 005ee87a3bf1d41d47d8a30af76ab91595319cf3 SHA-256: 548769631faf9ec65ee1943430e27b15e5c991f11e5dd7fb13fa113599b0992b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/aws?utm_term=comptia+linux+study+guide PDF link annotation
    • https://cdn.sqhk.co/ruzaxube/UiaQiaN/demalena.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480162/normal_600909773ffcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501208/normal_600bc60fa0caf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482012/normal_5ffdb8925dc3f.pdfIn PDF document text
    • https://cdn.sqhk.co/loxepafigav/geMfeiX/best_drought_resistant_grass_australia.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379846/normal_5ff9f5912cd72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501360/normal_5fcad8f126bae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464524/normal_5fe1a3154a284.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386333/normal_6003a1561c2dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502563/normal_5fe9ed4593189.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/sajatesawodiji/separador_de_programa.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/templateurl_not_working_angularjs.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/divapi.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/halloween_worksheets_fourth_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/counter_strike_1._6_servers_game_free.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_off0000ea11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA11 5260 bytes
SHA-256: b29d668538cf0fb80c1d728f2ceb19be63b3697f7cdb7ca0f439281d918cee74
font_01_sfnt_off0000fbe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE7 11444 bytes
SHA-256: e9e392db84bbbb583c64446610893db6d04b8eab143ceac06b71bb01df68ca47