Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c64e44f329928f…

MALICIOUS

PDF

48.0 KB Created: 2021-04-10 16:20:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 246a98b0ea56a980d95762abc2537788 SHA-1: d3aa30d296f393658febe162e385de846653ab17 SHA-256: 37c64e44f329928f1abb7fe93bac7858b2ee7e2e10192d31b172488b175caaad
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7606

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://pelibifir.ru/strik?utm_term=introductory+statistical+mechanics+by+bowley+and+sanchez PDF link annotation
    • http://nomokesus.sportsontheweb.net/uos_ma_admission_form.pdfIn PDF document text
    • https://kofodurulivikaf.weebly.com/uploads/1/3/3/9/133997487/8152406.pdfIn PDF document text
    • http://ganitigusawev.mygamesonline.org/international_journal_of_research_and_analytical_reviews_indexing.pdfIn PDF document text
    • https://tisawotaw.weebly.com/uploads/1/3/5/9/135993845/pevugumalusuno_waruzewefu_jeriz_lofigizuzux.pdfIn PDF document text
    • https://luzidasagozoro.weebly.com/uploads/1/3/4/3/134319964/bizijeboxevet-sinoniresep-doxarifivuv-bizavoxubutok.pdfIn PDF document text
    • https://zopoxetofosifa.weebly.com/uploads/1/3/4/8/134863155/bbfc0dec.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/ab6a4.pdfIn PDF document text
    • https://xejigidusulup.weebly.com/uploads/1/3/4/7/134730122/1116626.pdfIn PDF document text
    • https://vewirorerisemi.weebly.com/uploads/1/3/4/6/134627211/fcfa92d.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/11583561514.pdfIn PDF document text
    • http://melowew.scienceontheweb.net/mcdougal_littell_algebra_2_practice_workbook_answers.pdfIn PDF document text
    • http://vuxilenusip.mypressonline.com/great_expectations_abridged_version.pdfIn PDF document text
    • http://ratixopawem.mypressonline.com/cancer_espinocelular.pdfIn PDF document text
    • https://zodosixuwe.weebly.com/uploads/1/3/4/8/134863902/dopot.pdfIn PDF document text
    • http://satiruxusis.epizy.com/fasuginidazodo.pdfIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_2edcbb9ee6cc4699b59695671412d884.pdf?index=trueIn PDF document text
    • http://vapewokadovusa.myartsonline.com/89618393313.pdfIn PDF document text
    • https://95fbbc11-640f-4658-acdf-6e09da746871.filesusr.com/ugd/e42ee3_c2a6fe6c3d9e449daa429f7081908fe3.pdf?index=trueIn PDF document text
    • http://zisifotixevul.rf.gd/gate_agricultural_engineering_books.pdfIn PDF document text
    • http://moliposapivar.epizy.com/logomefigolukuvop.pdfIn PDF document text
    • https://77a48bbd-706a-45f8-a225-ac1cc02029d7.filesusr.com/ugd/3be48b_8678fbbf0b464c1d8cdf46df59a1c8bc.pdf?index=trueIn PDF document text

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