Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec46a9f8f63bbd5a…

MALICIOUS

PDF

72.6 KB Created: 2021-02-25 03:55:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6b18b3a88b7a59c4eed4f4848d09920d SHA-1: b9b664077d59a32848ce81f72694952194bf8662 SHA-256: ec46a9f8f63bbd5a5237963b26ad926e0ef71882d2ab244232cc715c5558ef6b
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/wix?keyword=true+skate+ios+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386089/normal_602d7664cfe91.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/the_eyes_of_the_dragon_princess_eng_sub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371508/normal_600672390243a.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/covid_test_delivery_jobs_liverpool.pdfIn PDF document text
    • https://nivunosanogerog.weebly.com/uploads/1/3/4/5/134516177/c1247c9d7115.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxodanokijaj.atwebpages.com/list_of_irregular_subjunctive_verbs_in_spanish.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/printable_isometric_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/android_tv_iphone_app.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/pupaburenepozujudobeker.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/accounting_rules_and_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jivamubug/zululefep.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/how_many_calories_by_age_and_height.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_off0000e1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F9 4792 bytes
SHA-256: b5c97518481eb736077de3187d07e7a6947ade741821381a944a60c54f5dfa61
font_01_sfnt_off0000f256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF256 10536 bytes
SHA-256: f04ff17c77350981b50e950bacc85a82989ae1d3382a7b3a5c146755b3a4a504