Malicious PDF — malware analysis report

Static analysis result for SHA-256 a309f8ea17ba50d1…

MALICIOUS

PDF

71.7 KB Created: 2021-02-26 19:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2d708dae436bf44a99eafd267b8af02b SHA-1: 1eb29bb2f863fe1cd1d982fdf8ac9ba2796e52a2 SHA-256: a309f8ea17ba50d1348ce048b5efb711ecae97a2ce2476773bb69e8efae5c85c
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://dafemum.ru/award?keyword=does+cbt+work+for+ptsd In PDF document text
    • http://wozutujetotox.iblogger.org/deception_imdb_parents_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_60224fdbb03f7.pdfIn PDF document text
    • https://nizomepovunamox.weebly.com/uploads/1/3/4/3/134305669/7982538.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/bgjib6v/6194126746.pdfIn PDF document text
    • https://cdn.sqhk.co/tavikalamo/gjgcudq/39138388959.pdfIn PDF document text
    • https://jowetirepenu.weebly.com/uploads/1/3/1/3/131383619/dekonenogupoxo-pagosujapavu.pdfIn PDF document text
    • http://ita-bio.space/64949543654r8l98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365619/normal_60078ccb97c04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_60205bece7024.pdfIn PDF document text
    • https://kerimoseb.weebly.com/uploads/1/3/5/2/135299904/sasim-zexerolag-futufozududevin-ketufuz.pdfIn PDF document text
    • https://xonajuximo.weebly.com/uploads/1/3/5/3/135311854/af1d045.pdfIn PDF document text
    • http://hangookoil.ru/spring_mvc_registration_form_example_with_jdbctemplate848tl.pdfIn PDF document text
    • http://vrestoran.info/tegemepujobakuvilet8ht2l.pdfIn PDF document text
    • http://testertumentum.space/99530268392v1ip5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zudegudaki.epizy.com/lagu_percaya_aku_remix.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/saketolekisovojomeboli.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/xagosefudi.pdfIn PDF document text
    • http://mumazidujinodu.epizy.com/xigasulusorisuso.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/bitbucket_commit_diff.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_off0000dcf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF1 5200 bytes
SHA-256: 6a224e20a3b61f8f66e6982a84fc3d95bb7f95dca20ef8faa25ccf118c6fe0e2
font_01_sfnt_off0000eecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECF 10228 bytes
SHA-256: e7c9390b584665599e34fe77e0e3d15100add6f05dafa0f8c32c5fd178b45ec3

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