Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5707c95d1290941…

MALICIOUS

PDF

75.6 KB Created: 2021-03-29 19:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f64dd5a38a7634a24e6352b327f6333c SHA-1: 6f91e9d6d6fb534b105d87b242554ac14f1022a2 SHA-256: e5707c95d1290941222f5eb72fe69b3d1607d3a1bdd0b08be22cf2a2358b266b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://druttle.ru/award?keyword=electromagnetic+waves+class+12+project+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421944/normal_5ff0875572a87.pdfIn PDF document text
    • http://pikevafew.22web.org/kumejoxowukakonoxamiju.pdfIn PDF document text
    • http://wimisumuvov.iblogger.org/nc_driving_permit_study_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_60511c756c97a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_600bd83bcf74c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369927/normal_60450d055078b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493876/normal_5ffade37b76da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375703/normal_5fff29719af9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449965/normal_604733172940b.pdfIn PDF document text
    • http://mamunetosi.iblogger.org/kenasevefewixofumexox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385852/normal_602b2c0cae6d2.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/ff68acce-6933-410b-9c7f-06329f3f52b8/meade_etx_125_telescope_accessories.pdfIn PDF document text
    • http://xirakogo.epizy.com/rirosalolalogij.pdfIn PDF document text
    • http://gotizafikaj.rf.gd/maserati_granturismo_mc_sportline_for_sale.pdfIn PDF document text
    • http://nijunopuk.rf.gd/adobe_acrobat_pro_dc_flatten.pdfIn PDF document text
    • http://digotoxijawuta.epizy.com/biblia_hebraica_stuttgartensia_a_reader_s_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec0055a-de5c-4e52-ad81-32e5a0079466/vozedetididugib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02e0af11-c290-4760-9d23-494eea503c61/61850560920.pdfIn PDF document text
    • http://lorenivi.rf.gd/veradasim.pdfIn PDF document text
    • http://remobufu.rf.gd/kejigitev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcece806-e5f0-4553-9209-91e5410ba089/how_do_you_change_the_date_on_a_casio_wave_ceptor_watch.pdfIn PDF document text
    • http://tabifewegijip.epizy.com/wazatid.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_off0000e8b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B2 5844 bytes
SHA-256: 770365c549fbd81bff3193e54c205705c695ec2e947c0dc9f07c139cb64f16cb
font_01_sfnt_off0000fca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA6 10588 bytes
SHA-256: 550cae9919073b3a1ea36b8cebfc83224c8ede0b8e6d21ea11556616713bdb2c

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