Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e0920c681a8ac6…

MALICIOUS

PDF

87.8 KB Created: 2021-03-11 15:19:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 0011a704fdcc11283db3e5e4ded998e2 SHA-1: 34ae114a546513fe43d798709ec4c793ff57b7d6 SHA-256: e0e0920c681a8ac664b5555aa7731b78b663a1ca5b8f25a9ea8bf89ef3cbebb8
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with a critical heuristic firing for a 'PDF_SEO_LINK_FARM'. One of the primary external links points to a URL that appears to be part of a link farm. The ClamAV detection and ML classifier also indicate maliciousness, with the ClamAV signature suggesting a phishing or trojan component. While no scripts were directly extracted, the PDF structure and link farm suggest an attempt to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://botokaw.ru/award?keyword=l+or+de+blaise+cendrars+pdf PDF link annotation
    • https://pufotesur.weebly.com/uploads/1/3/1/3/131378771/fogezale.pdfIn PDF document text
    • http://ludirobus.getenjoyment.net/how_to_reset_a_viper_car_alarm.pdfIn PDF document text
    • https://rudumareta.weebly.com/uploads/1/3/1/8/131871695/bereriger_gavasikowepez.pdfIn PDF document text
    • https://sogatetemurus.weebly.com/uploads/1/3/4/3/134379625/zasurolikul_xiridim.pdfIn PDF document text
    • http://ravasixojodari.mygamesonline.org/13702681318.pdfIn PDF document text
    • http://nibewubixela.getenjoyment.net/nuwezabawetejisesoni.pdfIn PDF document text
    • http://fodefon.getenjoyment.net/lalumogamovibikel.pdfIn PDF document text
    • http://rexonina.medianewsonline.com/formas_de_comunicacin_oral_de_los_pueblos_guatemaltecos.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/baxegezivumi/boston_market_chicken_pot_pie_price.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/74458998709.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/fafifob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14012e32-e31c-4250-bdbd-289c7618508f/57307828394.pdfIn PDF document text
    • http://kuwitabetegipo.myartsonline.com/define_instructional_leadership.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/casio_gw_9400_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d771d37-5790-4b29-87aa-244d2749045b/how_do_you_know_how_many_elements_are_in_a_compound.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a7ef74d-b6c8-434e-8c3e-c52dce92af36/the_ending_of_the_mist_finally_gets_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f517bff2-99c5-4de5-afdd-237bbe7988e8/14712696434.pdfIn PDF document text
    • https://b3079848-b07e-4d89-9244-05dfa5dd91fe.filesusr.com/ugd/3ab5ed_eb3b2696583e4ee19da235113807a236.pdf?index=trueIn PDF document text
    • http://makakanow.onlinewebshop.net/how_to_become_successful_in_network_marketing_business.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7812d3-eee3-479a-9dc7-46f2bed8f6f9/doro_cell_phone_voicemail_instructions.pdfIn PDF document text
    • https://54a0e2cb-796f-4f80-9aaf-d11633176b06.filesusr.com/ugd/b0c554_b009b5dd19cb4dc8b4f5a4045aaa7156.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/edital_prf_administrativo_2014.pdfIn PDF document text
    • https://737c154f-ca75-4484-807d-9d5c19d76377.filesusr.com/ugd/7e84b7_8bcd7e056f6146ea8ac05054a0e1cef6.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F5C 4940 bytes
SHA-256: 9c7aa3ccc0f90d4f64347cf1bdf2104887576abf1636f0937aba989667a13252
font_01_sfnt_off0001201e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201E 10380 bytes
SHA-256: 967aa5682878de910036005f35627a8915f7b31c8ea9402044bcc056d2c82bfd
font_02_sfnt_off000143b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2