Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecafee5269bb8af0…

MALICIOUS

PDF

78.8 KB Created: 2021-03-23 17:27:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b4284aaa66294fe12c0aab4fe7b24e61 SHA-1: 57cca9930c98e09f6391250c8fb4bb4344ded97a SHA-256: ecafee5269bb8af0d1c126a796eb75cdf286f1ac1752958467c1cd141859f756
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://vilenefex.ru/award?keyword=collocations+dictionary+pdf+vk PDF link annotation
    • https://cdn.sqhk.co/totudavomud/ltvib1k/great_dictator_2012_movie.pdfIn PDF document text
    • http://vowuzemiru.medianewsonline.com/phoneme_chart.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/JShgpjj/givegojokujonililajagit.pdfIn PDF document text
    • http://bivoliku.mywebcommunity.org/adirondack_hiking_map.pdfIn PDF document text
    • http://dokaxirugik.medianewsonline.com/aerospace_and_defense_industry_overview.pdfIn PDF document text
    • http://pavogireb.22web.org/ocarina_of_time_3ds_heart_pieces_guide.pdfIn PDF document text
    • http://pazadixokumox.sportsontheweb.net/77620476235.pdfIn PDF document text
    • https://cdn.sqhk.co/vemudumuxixu/jc5ggif/50478991349.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/gh0hceA/nelewolugux.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/ley_riesgo_de_trabajo.pdfIn PDF document text
    • https://cdn.sqhk.co/xuluriwu/hgxgiid/xebuditoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wawaxujogoned.rf.gd/lapilosobejebuxaxotuse.pdfIn PDF document text
    • http://zodiripek.myartsonline.com/91784564591.pdfIn PDF document text
    • http://pulitisagot.atwebpages.com/best_light_reader_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3cb8540-becd-4610-81a7-aed8ae4c236c/64408325873.pdfIn PDF document text
    • http://wozimape.onlinewebshop.net/vamilakunidujujifavegutav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90b19102-9c8e-425f-b5f3-9603c6557783/wojobilidixekaxerak.pdfIn PDF document text
    • http://bitenozof.atwebpages.com/brother_p-touch_label_maker_pt-h100.pdfIn PDF document text
    • https://b03e51a8-7171-48c0-94d6-e4c032e6f37f.filesusr.com/ugd/9421c8_5eba0e2b8f76402b9e1206ab275ff6b0.pdf?index=trueIn PDF document text
    • https://8d6920c1-aef5-45ed-b1a0-e693d63948fb.filesusr.com/ugd/0a593f_72bebe72635a4810a23ba684952ba54a.pdf?index=trueIn PDF document text
    • http://lumuwejonalar.epizy.com/loleximotopusilano.pdfIn PDF document text
    • http://feramivo.rf.gd/parabolic_line_of_best_fit_excel.pdfIn PDF document text
    • http://womidelere.myartsonline.com/emotional_development_in_infancy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fadf53c9-7ef8-4d18-b0cb-f85f8ed6abff/vivug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/037c296d-f4b7-42ce-8517-339f731f2776/97828264527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e28327aa-6293-4f8b-a9eb-598ef750ed87/luvedafamu.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_off0000e813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE813 5280 bytes
SHA-256: d6ae16edafc58da7c792d6186c990bd13848cb84d1fe3ef5b5867f55750f7aa6
font_01_sfnt_off0000fa27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA27 15960 bytes
SHA-256: 747a76de9f6f04bb03602b0853eebd20fcace357c57e724c2ecaa41526025222

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