Malicious PDF — malware analysis report

Static analysis result for SHA-256 190ac6090069feaf…

MALICIOUS

PDF

85.2 KB Created: 2021-03-15 16:31:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 50091122703e844260c60f2d7ff91527 SHA-1: 7d3369cdefe7eb190ffac3d14a9f3e4431592418 SHA-256: 190ac6090069feaf87684be74cdfc8ea65d13a618442346650bfa36b83ae137a
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying a link farm. One of the primary external URIs, 'https://zajinet.ru/wix?keyword=tank+trouble+6', is suspicious and likely leads to a malicious site. The ClamAV detection and ML classifier strongly indicate malicious intent, consistent with phishing or malware delivery.

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 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://zajinet.ru/wix?keyword=tank+trouble+6 PDF link annotation
    • http://bumaga.bz/pugutifuwatabuso7pfth.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/lakshmi_sahasranama_stotram_in_telugu5sbls.pdfIn PDF document text
    • http://italiahot.space/tutapepiwuwekagikali48ywu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://podisibasozo.rf.gd/93649286802.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/53917714093.pdfIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_2a8252ada4224d8e8c2c2b074f042fdc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/liluvad/vivofit_jr_2_star_wars_first_order.pdfIn PDF document text
    • https://6bc553e5-d0de-4278-827a-c77c8eb32fbd.filesusr.com/ugd/4a6c57_7b7357fd19be4c18982433f4112843fd.pdf?index=trueIn PDF document text
    • http://wadafitukaleka.rf.gd/lakekemodutufotusotav.pdfIn PDF document text
    • https://d064ede3-316f-4d13-8ec5-014b2136b3bd.filesusr.com/ugd/154db6_6e9eb65b93c649f3bd7869de2b3192f7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lazesej/wudarakuvejo.pdfIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_8eeff054d65a402487f506c079993f11.pdf?index=trueIn PDF document text
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_c52c2df7745b4141be9bf34bab2934c6.pdf?index=trueIn PDF document text
    • https://b8e64ff8-a522-4625-8e91-70fe47930cb2.filesusr.com/ugd/37987b_2d66911ecab54b7582a1722e2f2377e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xakusineba/xetavorajudewi.pdfIn PDF document text
    • http://jipokonot.rf.gd/acalculia_sintomas.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_1a8fa76078734a5d9e87f74f914366b1.pdf?index=trueIn PDF document text
    • http://wegakitiz.epizy.com/lalasilojozodifaze.pdfIn PDF document text
    • https://cf336f9a-6a79-4542-9269-5b62d6eb69dd.filesusr.com/ugd/1daf83_cdb40fd09dd04e56b7d55d1540ab97e5.pdf?index=trueIn 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_off00011388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11388 4808 bytes
SHA-256: c1f6b2e6fa5626659589674fbec283bfd21c40b37c4ec244a9a6bc036cd43606
font_01_sfnt_off000123f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F8 10488 bytes
SHA-256: 7e5d39bca4ed45fffd0329e22bc0016a9cbfc77a469999bf97def16a7ce558e1

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