Malicious PDF — malware analysis report

Static analysis result for SHA-256 27c0a324e92be04c…

MALICIOUS

PDF

66.4 KB Created: 2021-02-12 22:46:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e41a225355ded65d2103e871abbeca68 SHA-1: d198e6002720570538a546703c3b28b4d8612de8 SHA-256: 27c0a324e92be04c72add7011bb7d9c5c5eb1c7947778e5319bb546c6aebf009
184 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.
  • 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/wix?keyword=investigating+the+declaration+of+independence+worksheet+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385004/normal_5fd3b61c7bb8f.pdfIn PDF document text
    • https://xizavuxovom.weebly.com/uploads/1/3/3/9/133986710/6913521.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366327/normal_601b11bc786dc.pdfIn PDF document text
    • http://ig-soft-team.com/5402029632t692f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_5fd88e5a404ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408858/normal_5ff2aaaa4d182.pdfIn PDF document text
    • https://zetidikusas.weebly.com/uploads/1/3/4/7/134740093/petizekejeput_xaxajimad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383322/normal_5fcea4016a038.pdfIn PDF document text
    • http://dietnatur.fun/45038625397rbiuu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475847/normal_5feb012a36082.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452392/normal_5fee1ac9dddbe.pdfIn PDF document text
    • http://klosheff.xyz/exploring_arduino_downloadkq0as.pdfIn PDF document text
    • https://vitozosusa.weebly.com/uploads/1/3/4/7/134727909/3912620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411922/normal_6022c0c74d362.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/fedufiporara/xapuluderipirapirez.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/vixopewopa.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/british_english_pronunciation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/28481267469.pdfIn PDF document text
    • https://s3.amazonaws.com/badodemebo/14494040336.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_off0000c5f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F3 5672 bytes
SHA-256: c350dc8a9bb7ba5d2d65ac5eac982cadf13a6cab621fe4825bd25a072df88a59
font_01_sfnt_off0000d955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD955 10136 bytes
SHA-256: 2c23d4babf679e1a76a3c2b3faab9d087e8fee9e08b13d391c92fd715a0a0716

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