Malicious PDF — malware analysis report

Static analysis result for SHA-256 6977da3f074f9324…

MALICIOUS

PDF

71.2 KB Created: 2021-03-14 15:45:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9a059e122179a644fb3a7af0606433cb SHA-1: a04a415bb7b3edf347eab29fdca479694c1c759e SHA-256: 6977da3f074f932437693a8c40e78cefe30b42cca3d4be3dda991795c1aa2448
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, and is flagged by ClamAV as a phishing trojan. The ML classifier also strongly indicated maliciousness. The presence of external URIs and the link farm heuristic suggest the primary purpose is to redirect users to malicious websites, likely for phishing or to download further payloads.

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/123?utm_term=telugu+devotional+songs++naa+songs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453719/normal_5fd9be7fb498a.pdfIn PDF document text
    • http://detonic-hypertonie.website/how_to_explain_the_balance_sheetc8tw3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492586/normal_6041122a12439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403565/normal_601758473bf0e.pdfIn PDF document text
    • http://copyrightnotice-ig.com/colon_cancer_screening_guidelines_age34ohf.pdfIn PDF document text
    • http://morpeoplelife.ru/86911305449yy579.pdfIn PDF document text
    • http://lukufogud.getenjoyment.net/cambridge_igcse_maths_student_book_second_edition.pdfIn PDF document text
    • http://nuwetiveguvo.mypressonline.com/can_you_be_allergic_to_pizza_rolls_in_the_fridge.pdfIn PDF document text
    • http://fevinoreniwelik.sportsontheweb.net/weteji.pdfIn PDF document text
    • http://vifezitenof.getenjoyment.net/bow_tie_pasta_with_sausage_and_peppers.pdfIn PDF document text
    • http://basiditdcf.space/gowemesipefaqf6a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410988/normal_6046ada46659a.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/95298563919.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/jolebanarivife.pdfIn PDF document text
    • http://kyponnik.online/person_tracker_toolkit_2017_appb0et9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470689/normal_5fec27ea5db9c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_c9071c0f342948e1afe0bb5983f456b8.pdf?index=trueIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_b724dd573e8b483b9d8ecda1078558e1.pdf?index=trueIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_588d5bff87764942817076f17c2f0a1d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/the_terms_of_reference_template.pdfIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_b49f7c10cbbe4187a398ddc47032ec65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nerugiraxura/butowe.pdfIn PDF document text
    • https://569961a5-e6b5-462d-8b38-7193d5e7b20b.filesusr.com/ugd/a37a2e_9d4a795b48d04c198d9e5d76d9ad2834.pdf?index=trueIn PDF document text
    • http://siwemoxoxawevuv.atwebpages.com/tanesafowevifeno.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_off0000daa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA7 4908 bytes
SHA-256: 282e63cebb47add8a161d8cf496720fe2591f3c4c4010eade8da2c3508c4e0c2
font_01_sfnt_off0000eb74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB74 10516 bytes
SHA-256: a7145109046dc06dff69f5c3a79b89380643e7be79703663d9ef4005c43e6297

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