Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6fbe3f28890110…

MALICIOUS

PDF

80.0 KB Created: 2021-04-12 15:20:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8ec5ff2156248e4d10bceb415daf09c9 SHA-1: f93ee8db0cbcd57fb1df28bacb2e0c3b25f956e5 SHA-256: 0a6fbe3f28890110d1ca91485fc93bbe939a6cde50a1ad937914fbea06b1b12c
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body's deceptive message and the embedded URLs reinforce this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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/strik?utm_term=cuando+una+mujer+te+busca+es+porque+realmente+le+importas PDF link annotation
    • http://prolac.ru/644791808175eoke.pdfIn PDF document text
    • http://hopecommunitynaz.com/88439757885whkq3.pdfIn PDF document text
    • http://tiktoktop.design/toastmaster_table_topic_ideasla84s.pdfIn PDF document text
    • http://mokenolovulonom.medianewsonline.com/assessment_centre_process.pdfIn PDF document text
    • http://lenudes.com/85922849588fbr22.pdfIn PDF document text
    • http://folejaf.mypressonline.com/tudotepamivejibakote.pdfIn PDF document text
    • http://tanuwoxomasosog.22web.org/nugozivuxivipubijakav.pdfIn PDF document text
    • http://filitopalanima.22web.org/area_compound_shapes_worksheet_answer_key.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/lowagevisosogegi.pdfIn PDF document text
    • http://redit.fun/do_i_need_to_add_water_to_my_masterbuilt_smoker7kygt.pdfIn PDF document text
    • http://nifimoperokoj.medianewsonline.com/formula_para_sacar_el_volumen_de_los_prismas.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/additional_mathematics_form_4_textbook.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_bafd8bb646334488ac37ae351439bd71.pdf?index=trueIn PDF document text
    • http://patuwovoparivi.rf.gd/structural_family_therapy_case_examples.pdfIn PDF document text
    • http://telosizaba.onlinewebshop.net/pinomiji.pdfIn PDF document text
    • https://49550882-97ce-44db-a38b-6e383bb81149.filesusr.com/ugd/062c90_0f22ab0590344d729a3d297b63882952.pdf?index=trueIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_8ced345c92d943748b94b34022f26d5c.pdf?index=trueIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_8c6ef9e8dc6441d5a21fff9bc969e668.pdf?index=trueIn PDF document text
    • https://a0e9597c-cfbb-4fc1-b0e0-47ed6411b148.filesusr.com/ugd/24269e_c8abbd00bf0d4fa2ae5fd407a68ac665.pdf?index=trueIn PDF document text
    • http://nudagimanefej.atwebpages.com/40282690179.pdfIn PDF document text
    • http://jovesupegomiz.epizy.com/dissection_of_cow_heart_worksheet.pdfIn PDF document text
    • http://rugogevegemup.rf.gd/87839302706.pdfIn PDF document text
    • https://b6f97e74-198a-461d-a312-d71b9712332b.filesusr.com/ugd/a2d007_24b1922e851844e6b45d64a7e7940b58.pdf?index=trueIn PDF document text
    • https://5fb3b2f4-e86d-4029-b823-ac5950ddf4c1.filesusr.com/ugd/c0aa49_8a6d6818726846688392f94f86c230fe.pdf?index=trueIn 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_off0000f7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A6 5468 bytes
SHA-256: 0258699f1b95fd9997d7ef88454a3b28bb96a8c462bea52bf12879b8bde71733
font_01_sfnt_off00010a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A19 11724 bytes
SHA-256: d11c2b38b99197891cdc43e90dd2f37066ebdddc9de26b916e85bbe82ff3de71

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