Malicious PDF — malware analysis report

Static analysis result for SHA-256 46139d0deab5a272…

MALICIOUS

PDF

81.1 KB Created: 2021-03-23 03:20:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 4d6f7a351e696cdc25734e19cb748566 SHA-1: 50f1dbaf931f35e1ca59dcea70004b6824d421d9 SHA-256: 46139d0deab5a2726209f382d9e6ae6c61c4c7ae9057750443d5062a2575edaa
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially harmful sites, likely as part of a phishing or malware distribution scheme.

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 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://seumenha.ru/award?keyword=electronica+de+alta+frecuencia+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417033/normal_6019c5aa2533d.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/celestron_nexstar_130_slt_for_sale.pdfIn PDF document text
    • http://lowabunuzoxa.getenjoyment.net/el_cristianismo_en_la_edad_media.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426063/normal_6056f16fdeb3f.pdfIn PDF document text
    • http://risumeboze.getenjoyment.net/zimexufage.pdfIn PDF document text
    • https://cdn.sqhk.co/nakotuba/nhakb8w/olvidarte_grupo_digno.pdfIn PDF document text
    • https://cdn.sqhk.co/pesegozod/hijhxjg/pagabamunogo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368952/normal_602c2a7f3e10e.pdfIn PDF document text
    • http://zisezamerares.mygamesonline.org/the_complete_ketogenic_diet_for_beginners_free.pdfIn PDF document text
    • http://pumidafefisun.iblogger.org/dejong_neurological_examination_7th_edition_download.pdfIn PDF document text
    • http://vevaroda.scienceontheweb.net/nilewatadas.pdfIn PDF document text
    • http://sovumeriwox.mygamesonline.org/josimotezo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuperag.epizy.com/51898979601.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0dad3701-28d4-4a18-bad1-31e83d0646e0/what_is_the_cash_flow_equation.pdfIn PDF document text
    • http://jasesazolaf.myartsonline.com/difference_between_symbiotic_and_nonsymbiotic_nitrogen_fixation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3111a606-4afa-4a1e-8cc4-fdc8f75bb6a5/36002325487.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/866f5c29-1d73-4e59-8064-2e1db433c521/nurarolagisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fd5e5b4-c2a0-4c11-93c0-3d618c9ff833/luxunidojowalejugikajegaw.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/pawutigifopot.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_off0000fd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 4928 bytes
SHA-256: 059ac003b540dff1b1383273e42d24cf236359f3e97e5621bc9b4b3dd23809c9
font_01_sfnt_off00010e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E76 12856 bytes
SHA-256: c07ffbfa2e1f8c76ef177abb4075ff6d9659866457f0700684071042081f0486

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