Malicious PDF — malware analysis report

Static analysis result for SHA-256 d27a33ac268fc82c…

MALICIOUS

PDF

77.7 KB Created: 2021-03-11 00:06:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e9c19bc62b97232a244f1125d3d5e787 SHA-1: fde274b7f60b8745b73a464544f76e49f2576c53 SHA-256: d27a33ac268fc82c0dca72df4786087c3debc7b7111dfeae51a19242a06353a2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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=journal+bearing+vs+ball+bearing+pdf PDF link annotation
    • http://mavpa.fun/shogun_assassin_streaming_full_moviewicmr.pdfIn PDF document text
    • http://dhl-order.info/rodagefedb185.pdfIn PDF document text
    • http://efarbok.xyz/mario_kart_tour_multiplayer_onlineigg6p.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/how_much_does_an_indian_roadmaster_cost.pdfIn PDF document text
    • http://punavuvipufov.sportsontheweb.net/53127148560.pdfIn PDF document text
    • http://pofaduxiruk.getenjoyment.net/computer_hardware_repair_tools_list.pdfIn PDF document text
    • http://nuwiratuzitezep.22web.org/diy_water_bottle_labels_template.pdfIn PDF document text
    • http://static-start.top/196510843753pn1r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://defisufinuriwo.rf.gd/23723158355.pdfIn PDF document text
    • https://f395d2f2-f939-483b-815f-81062d4747ff.filesusr.com/ugd/be2697_e11eed3d4f7249b794a211bde7903a12.pdf?index=trueIn PDF document text
    • http://xemunebo.atwebpages.com/2410503555.pdfIn PDF document text
    • https://ede36962-9452-4451-b182-fa4236ba9bc6.filesusr.com/ugd/83b1b3_3dff5dc2e7664b18874b534ff8bb6ef5.pdf?index=trueIn PDF document text
    • https://07bd7893-a6ec-44d5-90fe-c719e602c0bd.filesusr.com/ugd/aafaff_bd656a494d2242f6be8e766f07633181.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juduk/medical_check_up_form_for_canada_visa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9034c69e-e01c-4247-afe5-0cfa2f33e98f/how_to_refill_oil_filled_heater.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/gurizuvexuvumifexewen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6691416b-7e22-4db3-9108-bd498cab5500/26003540750.pdfIn PDF document text
    • https://s3.amazonaws.com/dazawojob/47213752056.pdfIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/gigedulu.pdfIn PDF document text
    • https://52468903-0e2d-47c5-babb-61e1d305d291.filesusr.com/ugd/32777b_adbd9f83e16545e1aad70a06ac001168.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5581ac4-0ac4-49cb-9183-2033608afa50/berger_and_luckmanns_the_social_construction_of_reality_published_in_1966.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/cara_bookmark_adobe_reader_dc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/022c9aa2-3ad0-4072-bcec-dd9e898e1c08/cuanto_es_1_84_pulgadas_en_pies.pdfIn PDF document text
    • https://s3.amazonaws.com/dadupawo/fazawativisaxulodomeze.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_off0000f31c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31C 5400 bytes
SHA-256: 9af44d07cbf593a788e036ddca761989bce3d51540daceafd780a64ab56c4a40
font_01_sfnt_off0001058c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1058C 10332 bytes
SHA-256: f89a0e90bec7b5fc2fbcae176088f1895447ee731281e16ac620523d56c7dad8

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