Malicious PDF — malware analysis report

Static analysis result for SHA-256 98393f647222ee4d…

MALICIOUS

PDF

80.3 KB Created: 2021-03-19 09:17:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: de0721d609e9808dbd07a1449e62a757 SHA-1: 88ee20f6aa3ed6c2953ffae7a3429a2a98333701 SHA-256: 98393f647222ee4d1b2f79e6302166cd5a68234b5be3b0280b92994e7109cb89
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One of these links, 'https://resalured.ru/strik?utm_term=how+does+then+she+was+gone+end', is directly embedded and likely serves as the primary lure. 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://resalured.ru/strik?utm_term=how+does+then+she+was+gone+end PDF link annotation
    • http://benaletuzulug.sportsontheweb.net/cm_list_of_gujarat.pdfIn PDF document text
    • http://lubenoredeji.mypressonline.com/adobe_reader_application_download.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/how_the_youth_justice_system_works.pdfIn PDF document text
    • http://bitiwiz.medianewsonline.com/xowigososebesijavij.pdfIn PDF document text
    • http://stavki-na-sport.site/casio_protrek_prg_270_specsv368f.pdfIn PDF document text
    • http://microbladingeyebrowsdallastx.com/tisererodukafidugofftv10.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://c1e70603-6ca1-47bc-880b-b60d7d434995.filesusr.com/ugd/df625d_4078448575ef4f34a251ee93acace2fe.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ritoma/gunepefu.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/dantes_inferno_game.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/is_thor_a_norse_god.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/process_improvement_flowchart_template.pdfIn PDF document text
    • https://2ac56fc1-f7ee-4366-9cb2-1681469c68ee.filesusr.com/ugd/b914b5_2291a36e3e3140818cc2bc155ddc3a5d.pdf?index=trueIn PDF document text
    • http://vekejuf.atwebpages.com/adobe_animate_cc_2020_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/navefenutajenatowovez.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/67497840146.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/amplifier_software_for_pc_free.pdfIn PDF document text
    • http://kifesafijupesob.onlinewebshop.net/kisutuvamujibipesajewo.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/how_to_report_statistics_in_apa_style.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_off0000f174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF174 4752 bytes
SHA-256: c05a8f688b140e3f8d7b46c11dea5822f34f3bb9b80e87d3faba61c91234ed45
font_01_sfnt_off0001019e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1019E 10628 bytes
SHA-256: 906c5393bc9ca87b9e92432e07c129749dbd5369aa0b0e6f9c9f931cd25b7fad
font_02_sfnt_off000125e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125E9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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