Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0338ef388fc9910…

MALICIOUS

PDF

67.3 KB Created: 2020-11-13 16:31:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: daa2fe286b9a3f227e3f77439b443558 SHA-1: bd350df2ac50eaf64bf05568b67a0c5f939f95b4 SHA-256: f0338ef388fc991097208415c9b69c906046b2976d77c02ea641e20c43f6dd28
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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.
  • 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://traffking.ru/strik?utm_term=evangile+de+philippe+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4443812/normal_5fa455f4c4d11.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/wakitafirumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483604/normal_5fad2503c8c5c.pdfIn PDF document text
    • https://masogipu.weebly.com/uploads/1/3/1/6/131606875/1284641.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368226/normal_5f8e262b82f39.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd19035-0f8b-4e22-806d-3e21e8c9f75d/volomuxom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd29d9a7-b9d9-497d-a9d6-b7915c6cd1b6/42785015648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c6a6166-510a-4155-b941-2a3196911f04/lenikaduxupazonimivap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e8c5e00-751e-4a39-b5d5-b1e88e0bea01/walking_dead_issue_100_covers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f48659ba-e075-41cb-bb44-457a58abd0a3/chinese_chess_strategy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/815edb01-cd16-4809-949f-713162be6dd1/bifapomop.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/fuforipixij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6787c880-1556-4ce3-a7cb-20e003848636/tuwobuzapiwijon.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/joderefopog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d132e28-137b-4f4c-acbe-14f5013fa8d7/pezevetuzazomukubagapifa.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_off0000c78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC78F 5048 bytes
SHA-256: 0363d25422fc6cdb18a7bca6dfe78b3d84885854ff752ed0d6f1e8e3ab45229a
font_01_sfnt_off0000d8d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D0 12176 bytes
SHA-256: 91b570c7c60ba92388738da013fe54f7ab733d14e8497867655575f95c23be06

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