Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f5c68b6fcc4389…

MALICIOUS

PDF

72.7 KB Created: 2021-03-05 06:45:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e356346c2903216e1510714e0ea8413c SHA-1: 4595e5757c263d19f1ae8ab5c1517a62dd7f42de SHA-256: 85f5c68b6fcc4389640f04552b897e270f8ac19b5dfd0775edbdbc3c86d19f2b
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/award?keyword=why+is+acetone+a+polar+compound In PDF document text
    • http://rubyshup.space/14934333792r0h9x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475999/normal_601d67a6464ad.pdfIn PDF document text
    • http://appletopshop.ru/the_lottery_by_shirley_jackson_story_quizqt5v8.pdfIn PDF document text
    • http://nat-fru.space/sapedeneribazv8y.pdfIn PDF document text
    • http://igbusinessabouthelp.com/tisexuxoteroluraborapevire87u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470521/normal_5fe0e54b1cb5f.pdfIn PDF document text
    • http://my-favshopg.online/how_to_adjust_recliner8fxa3.pdfIn PDF document text
    • http://futup.ru/definition_of_educational_psychology_by_different_authors_namesk7jfm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5fd79300124f9.pdfIn PDF document text
    • https://ninegepidilu.weebly.com/uploads/1/3/0/7/130738727/bf9911781.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385617/normal_5fe2963077262.pdfIn PDF document text
    • https://mulolixebewiw.weebly.com/uploads/1/3/1/3/131383386/3153445.pdfIn PDF document text
    • https://gosevitugelaw.weebly.com/uploads/1/3/4/4/134439416/ritizipizaneb.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/d502ea78-71b2-4488-9823-0e051326d741/61677368726.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09e4b311-b38a-4379-a3ab-ffb30d3cd680/69474112509.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc6395d0-0713-45d3-b882-5308d15770fe/zelenavo.pdfIn PDF document text
    • http://zuwarikufaz.epizy.com/tesitukesiwojo.pdfIn PDF document text
    • http://povalimokuwov.rf.gd/21240035607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73f76844-c418-4c60-aa05-ad308e02141c/42525698573.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0573195-39a4-4a96-8789-5f092b337481/widewa.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_off0000e06b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06B 5428 bytes
SHA-256: 67ef70ea95f3169c713785e9f6d942eefaf3eddb2b01f40be89bbe17441963f9
font_01_sfnt_off0000f2c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C7 10164 bytes
SHA-256: e5d7eea9555d89e3d325afb32cba32ad8caf926c0d8e56157d5afbd139bce4d9

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