Malicious PDF — malware analysis report

Static analysis result for SHA-256 97e1c770b4e5755e…

MALICIOUS

PDF

85.0 KB Created: 2021-05-13 21:04:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 1983d28dafab8d76c341f31895ca3079 SHA-1: aa575168c6032670e9d5d486b2bd673812a3511e SHA-256: 97e1c770b4e5755e5d27f3ef16ccb1a7067591cd030884fdba58f5b0b17580d4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'vilenefex.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to economic development, likely intended to trick users into visiting the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vilenefex.ru/strik?utm_term=is+higher+per+capita+income+a+good+measure+of+economic+development PDF link annotation
    • http://gibelineg.sportsontheweb.net/9_point_hedonic_scale.pdfIn PDF document text
    • http://wupemokabate.scienceontheweb.net/fovulevufafitivopegemuwal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_600be0a6a4ece.pdfIn PDF document text
    • http://lotusedafefuwi.22web.org/74420807419.pdfIn PDF document text
    • http://lutafem.getenjoyment.net/7069723622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448548/normal_6023d822a4144.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490001/normal_6041bc0e47f47.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/grade_6_math_word_problems_worksheets.pdfIn PDF document text
    • http://padojobimo.mywebcommunity.org/lizubu.pdfIn PDF document text
    • http://safijejog.mygamesonline.org/64236414399.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/notudimovokazivawizolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423714/normal_60675e1536df5.pdfIn PDF document text
    • http://gonimuliveza.22web.org/tratamiento_de_anemia_megaloblastica.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408992/normal_5fef9f04f17af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dinorafox.epizy.com/les_miserables_broadway_show_plot.pdfIn PDF document text
    • https://973697ad-ffa4-4f9d-85cd-0c9d1ea039ee.filesusr.com/ugd/5f5755_ed16eeef8b044f1fb85b18216347c60b.pdf?index=trueIn PDF document text
    • https://6c892e0d-5736-4b4a-96a3-cd490fd1fe3d.filesusr.com/ugd/1407cd_f781099be3e147dba9dfe8719796a8fd.pdf?index=trueIn PDF document text
    • http://vujapaporetakik.epizy.com/65221601947.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e00b10ce-97dd-4c4e-93bd-1ba639dfd4ee/5216052602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f46a25e1-67ea-40e9-b65e-48629ae4ed0c/77564842973.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a960d0-6326-41a2-83ad-301afa74278d/nix_8_inch_hd_digital_photo_frame_review.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_a031eca848744b72a425c9277e8a715a.pdf?index=trueIn PDF document text
    • https://6d23287f-a15b-43b7-8d69-700c0e01f504.filesusr.com/ugd/185c00_b2a72aab4a5849698024d68025df5675.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/21c2bb79-f9cf-488b-9bf3-3ea7061a600e/how_to_loosen_tight_rope_knots.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_off00010cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CFC 5568 bytes
SHA-256: fecadcac513e38198a49acc4617e8b67596f009909f44b76b8b6da573c0b421c
font_01_sfnt_off00011fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCF 11240 bytes
SHA-256: 975de16f29fb0120fffab113d3a47bb5daf0e95fcd3fc6762369d72b40301253