Malicious PDF — malware analysis report

Static analysis result for SHA-256 c77174a8101414c8…

MALICIOUS

PDF

80.4 KB Created: 2021-04-26 09:47:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1f96311d98d81a723fadb44ac4489dd3 SHA-1: d689ed39f1c946b93a49748dbebee04fb868daa7 SHA-256: c77174a8101414c8adb08c2c60bc611e220b3bc10a92638cf485a7e9fb56ae6a
156 Risk Score

Malware Insights

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

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 0.9995

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.
  • 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://fokemale.ru/strik?utm_term=administracion+de+medicamentos+en+pediatria PDF link annotation
    • http://hookup157.fun/teste_de_atitudes_alimentares_eat-26_verso_em_portugus3xenz.pdfIn PDF document text
    • http://gratoramm.website/how_many_calories_in_a_leaf_of_lettucejklrw.pdfIn PDF document text
    • http://erethiztzj.space/business_english_books_freetl1an.pdfIn PDF document text
    • http://blog-millionaire.buzz/neruxuvisuwh1hs.pdfIn PDF document text
    • http://arendaavto.taxi/impact_of_globalization_in_tanzaniaxaanv.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/articles_grammar_exercises_with_answers.pdfIn PDF document text
    • http://gratoramaa.website/minecraft_1._14._4_optifine_forgekmzfe.pdfIn PDF document text
    • http://hookup153.site/84509747083mx4xu.pdfIn PDF document text
    • http://salebox.shop/vukitubedudaluravabowax62hmo.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/holistic_development.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/febrile_neutropenia_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/tiger_quotes_life_of_pi.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/16218164385.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/arfken_mathematical_methods_for_physicists_6th_edition_solutions_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/7864981890.pdfIn PDF document text
    • http://dawejur.atwebpages.com/59584108663.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/xajaxolo.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/aprilaire_600_install_kit.pdfIn PDF document text
    • https://3c4962d9-41f7-4f14-8396-dad57cc8de20.filesusr.com/ugd/a2de88_9b1eda74dcf440f8ab2642a123d574e6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/kmsauto_activator_windows_10.pdfIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_b187fb37660b435fa24a28681af38cca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kudufigunabi/the_art_of_living_course_management_system.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1B 4964 bytes
SHA-256: f520b026de3674706f6039708491303b42a9b738c66a70e848fce742933110ed
font_01_sfnt_off0000fccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 13688 bytes
SHA-256: aa5275c9f7bd28c9bd227f84dab241354c458eac11c733e70c6eb2039fdac1c8
font_02_sfnt_off0001252d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1252D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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