Malicious PDF — malware analysis report

Static analysis result for SHA-256 3171609a9f383986…

MALICIOUS

PDF

81.5 KB Created: 2021-04-14 17:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9568ae0a49c0c836259142d0e422e686 SHA-1: ec4072ebdece6c4d333b6fe33ac25ef080ac5b61 SHA-256: 3171609a9f3839866c52f0600a53a4829f7d861ad376c80b6a39a16f9dd212e4
126 Risk Score

Malware Insights

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

The PDF contains multiple external links, many pointing to disposable domains, and is flagged by ML and ClamAV as malicious phishing content. The document body, though partially garbled, suggests a lure related to a book title, intended to direct users to malicious URLs like https://mezovuduw.ru/strik. The presence of embedded JavaScript, though not explicitly detailed, is a common technique for exploiting PDF vulnerabilities or redirecting users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://mezovuduw.ru/strik?utm_term=resumen+de+la+casa+delos+esp%25C3%25ADritus+de+isabel+allende PDF link annotation
    • http://biomanua.website/technical_drawing_isometric_viewszqmr4.pdfIn PDF document text
    • http://zijofazasogija.getenjoyment.net/jopiximozewe.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/rifatetego.pdfIn PDF document text
    • http://tigafik.mygamesonline.org/english_speaking_eye_clinic_near_me.pdfIn PDF document text
    • http://hotita.space/kigeboxixu9v07c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466370/normal_604f16f65a49c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389601/normal_606a3d3d792ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443598/normal_604bb59b65e77.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/tenebukorelusupinubomo.pdfIn PDF document text
    • http://hookup753.fun/970446060695kbhy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_60372bd4c3b69.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/latulaw.pdfIn PDF document text
    • http://axecheat5.xyz/62975622658adfv2.pdfIn PDF document text
    • http://jutidewolojura.mypressonline.com/aplasia_medular_2020.pdfIn PDF document text
    • http://rubisteq.online/algebra_nation_section_1_topic_2_answerscdf5n.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/cards_against_humanity_cards.pdfIn PDF document text
    • http://benivosefemiza.medianewsonline.com/lezaperenesozato.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gitodake.myartsonline.com/suxanekarixufewugofoj.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_43debc3468d04c5098668b1b88aa173a.pdf?index=trueIn PDF document text
    • http://rivetibixonapaz.myartsonline.com/apspdcl_new_connection_application_form.pdfIn PDF document text
    • https://7054f9d6-44ea-4b6c-8535-0d04e7cb9957.filesusr.com/ugd/963b03_fbd84c379f21461fa2f0f4accc3547ab.pdf?index=trueIn PDF document text
    • http://fararisujis.myartsonline.com/prachin_bhartiya_itihas.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/33335012572.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_off0000fb1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 5420 bytes
SHA-256: 9eae0cb1553382dc333fa301ae65b0b888de752c539b07b6c9456884e996fb1a
font_01_sfnt_off00010d6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6D 12292 bytes
SHA-256: 700b43d2f24c628a6387edd69f094406721b96ee2bccc5792c4105a9e5857ed6

Open this report in the interactive analyzer, or submit your own file for analysis.