Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ac72ac2a5b56d2…

MALICIOUS

PDF

67.8 KB Created: 2021-02-15 19:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7bafb3d85158b259072f399a9bf0e180 SHA-1: 61716530128cd832d6ea6790861735eb4af9e0fa SHA-256: 45ac72ac2a5b56d255830f71f875ff4890d4e3e9d1384294e7df917e6a5e0cb1
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=passport%209500ix%20vs%20x80 In PDF document text
    • https://cdn.sqhk.co/rubovadu/1uFienY/dogfight_1942_review.pdfIn PDF document text
    • https://cdn.sqhk.co/xexerekija/hMA5hft/cebu_pac_maximum_baggage.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489061/normal_600c5f6e22b0f.pdfIn PDF document text
    • https://cdn.sqhk.co/noxivudeva/RfLidjr/fofegukewapid.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/bipovoromoj/toxofafebogol.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/aiding_and_abetting_sentencing_guidelines_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/wirojamikegajasiwupel.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/fsx_cessna_172_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/49080905710.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/firefox_nightly_32_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/aspect_ratio_changer.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/equipment_maintenance_procedure_template.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/gobozijizipipasekoworanez.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/activated_carbon_from_rice_husk.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/44037552358.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_off0000cc88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC88 5528 bytes
SHA-256: fc49d8add727c6730232b14b8e0d17c6f2552781dbe900000ba3fa50a3c8bb6c
font_01_sfnt_off0000df64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF64 10308 bytes
SHA-256: 7ce23f90096b89c2b89ac20ec31fa2ffebb9be7e017479ffca0f1451f03829ba