Malicious PDF — malware analysis report

Static analysis result for SHA-256 883cfbaaaaca0cb1…

MALICIOUS

PDF

75.9 KB Created: 2021-03-19 21:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6ce571004d056736af806b23474e294c SHA-1: a28476fdbf7b86427df7dfabdde9a03e2c7d837e SHA-256: 883cfbaaaaca0cb131138965acb1ca7c7948e4edd745f0021d2095315c328414
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a spearphishing attachment attack designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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
  • 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/123?utm_term=windows+movie+maker++windows+7 PDF link annotation
    • http://brosbass.com/foodsaver_v2490_manualt1whf.pdfIn PDF document text
    • http://sportita.fun/macos_catalina_beta_installersdrpx.pdfIn PDF document text
    • http://sweetygirl.club/windows_movie_maker_licensed_email_and_registration_code_list_20197nwdv.pdfIn PDF document text
    • http://lnstagramcentre.net/406929451620wcf0.pdfIn PDF document text
    • http://samelike.site/psychrometric_chart_for_engineering_thermodynamicsu6l0t.pdfIn PDF document text
    • http://pristav.pro/foxepegel583a.pdfIn PDF document text
    • http://zoneeuro.pro/first_alert_7010bsl_beepingwau3s.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/cuantificacion_de_proteinas_por_el_metodo_biuret4w8ta.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/04e8ff03-b252-4f1d-8c3a-a8c68c3c15e2/mechanical_engineering_jobs_colorado_entry_level.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5134e36-311d-4d1a-afa3-a10b63a08191/lepuxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e326ba9-ada6-4c3f-92cd-5ce77e140bf8/winnie_the_pooh_online_book_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b969628-7737-4aec-92b1-fc9e1b46835e/baditora.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/59967943832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/425ed5bf-7c26-4d7c-a242-e43b23a6be6b/96593398031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/193d29a7-6049-49df-8bf6-1dc09b877733/vedoburokofodoz.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/47858823624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4e22ff1-2bdc-4431-8038-266c010a5bc4/how_to_make_a_homemade_notebook_out_of_paper.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/air_conditioning_system_design_manual_ashrae.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/pojolavilo.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/kakutoxave.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 5248 bytes
SHA-256: 1e3742f26f5d452d33a05ecf05e2d3a9555c2734543f56987b014be38fca6904
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 10432 bytes
SHA-256: f6c5e3116d83bd4793f1f9ac892e5cf2bfa6e20307c31e401e934c996cbea810

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