Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0341ed680c1afa…

MALICIOUS

PDF

101.5 KB Created: 2021-04-03 16:31:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 7d46d466b9fa9726967847142c2f2282 SHA-1: 0874194b8c9438066e38c582c3dbe0f2d35b3f60 SHA-256: eb0341ed680c1afaa1aa33d1b77ce117eb9d759f818fe5f3a2c826ac696fb956
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a phishing lure designed to redirect users to malicious sites.

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
  • 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://xajibur.ru/award?keyword=vertical+farming+thesis+pdf PDF link annotation
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/vibolilaxufob.pdfIn PDF document text
    • https://wuwebiwurumebil.weebly.com/uploads/1/3/1/1/131164488/9663785.pdfIn PDF document text
    • https://zunuduzeguw.weebly.com/uploads/1/3/4/3/134344012/13c34d6a837e84.pdfIn PDF document text
    • http://kovemiwixipogaf.66ghz.com/rimimetonisexobomukare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_6053b134729f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402262/normal_5feb2650b0e0c.pdfIn PDF document text
    • http://dazuxej.22web.org/gatley_on_libel_and_slander_12th_edition.pdfIn PDF document text
    • http://senaxemuj.iblogger.org/fegulimiginubuvutolovomu.pdfIn PDF document text
    • https://pusesame.weebly.com/uploads/1/3/4/6/134662227/3235c01168d1d4.pdfIn PDF document text
    • http://lnstagramsecurity.net/refomurekujefolumebemuujqq.pdfIn PDF document text
    • http://islta.fun/probability_and_statistical_inference_10th_edition_free_downloadickh4.pdfIn PDF document text
    • http://arendagg.xyz/how_do_i_change_the_oil_in_my_club_car_golf_cartlbf7o.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462985/normal_604a8e123eeb0.pdfIn PDF document text
    • https://rosanibo.weebly.com/uploads/1/3/4/8/134873488/7313780.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367268/normal_5ffe70d7df908.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zimeketoxera.epizy.com/xitafez.pdfIn PDF document text
    • http://makowadoka.epizy.com/fotibaneguzapaguzemor.pdfIn PDF document text
    • http://biborufa.epizy.com/star_trek_discovery_season_1_episode_1_cast.pdfIn PDF document text
    • http://nixipidulateva.rf.gd/caucasian_chalk_circle_questions_and_answers.pdfIn PDF document text
    • http://vuduluxepo.epizy.com/40921966264.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_off00015077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15077 5532 bytes
SHA-256: f59d15c32392926e04cfcb2b17c38c2b6dce709078171de10d88625b79d24899
font_01_sfnt_off00016321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16321 11148 bytes
SHA-256: bdb879dd5f258c18915cbbd1894eb9b1457d3eb08342fb730465a14e4ca3da51

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