Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38c92b1ecdc0a01…

MALICIOUS

PDF

74.6 KB Created: 2021-03-16 15:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 3ca23cfb44962536f1efdad0adf0e26b SHA-1: c842ae918a9b85b442c24020dcd242478670f57d SHA-256: d38c92b1ecdc0a01427550219119d7d022795558abbe321c1a1d67df9222d068
126 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs, particularly the one on 'vilenefex.ru', are likely used to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/strik?utm_term=what+does+the+phrase+along+for+the+ride+mean PDF link annotation
    • http://podipotekoi.ru/britax_marathon_clicktight_convertible_car_seat_rear_facing_installationeseyt.pdfIn PDF document text
    • http://unreguezff.rest/56885772492w9svw.pdfIn PDF document text
    • http://uuuuull.space/mezokenanobifasumubobamub1ep9.pdfIn PDF document text
    • http://sport-stavki.fun/material_science_and_engineering_9th_edition_solution_manualt7lnc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367964/normal_5fc93d24962c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_603df238e9698.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392193/normal_603d28ec11f09.pdfIn PDF document text
    • http://bonifacy.site/57617031355t5ui9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366627/normal_5fec776728976.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/xabofisekilefivuwumaw0tmt.pdfIn PDF document text
    • http://afracheat8.xyz/big_ganga_bhojpuri_channel_appsvl5um.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464735/normal_6005111e407e3.pdfIn PDF document text
    • http://ru-en.xyz/co_signer_agreement_templatenkvvp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/c9b588d3-320c-45f2-98e4-c7833b6cd595/netuvobeneloweluxexeliwu.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/71639152492.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/pafokasasadareneparugi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c56b02a-23a1-4239-9e74-9a23139adbb7/mozigajuwuwabalamo.pdfIn PDF document text
    • http://lulatupesufij.epizy.com/what_is_koi_in_japanese.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/audiomack_cracked_apk.pdfIn PDF document text
    • http://sapumazolexu.epizy.com/deloitte_consulting_resume_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA94 5256 bytes
SHA-256: 67eabc40891a2f1deb7d9cd554fd97ee39dc684a63e39979fbc46c6fc4e25028
font_01_sfnt_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 9936 bytes
SHA-256: 1e75793fcb865bdb4fbb627846a968c08873dd3db7280d2159fe64a7ec97e9ec
font_02_sfnt_off00010e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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