Malicious PDF — malware analysis report

Static analysis result for SHA-256 d67457dc269d59bb…

MALICIOUS

PDF

75.8 KB Created: 2021-04-05 17:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 26af2c8a77f45a2d9c01b81771e2e950 SHA-1: b6c49b26347b1af3c71a568e5ca13ce2b1e85578 SHA-256: d67457dc269d59bba8c957e13ca5893e58edaba8133deccaf6cf48b380cc6db8
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one prominent URL pointing to 'vilenefex.ru'. Heuristics indicate this PDF is a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support a malicious classification. No scripts were extracted, but the presence of multiple URLs and the link farm heuristic indicate the primary goal is to redirect the user to a potentially malicious site.

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=computer+network+technician+salary+in+canada PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366340/normal_6047a072a6ca0.pdfIn PDF document text
    • http://zakewabo.scienceontheweb.net/behavioural_science.pdfIn PDF document text
    • https://cdn.sqhk.co/suwuwewazaka/s8gcQjc/towujigiwupasezomafe.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/52244323812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379362/normal_60342b0e9b8a6.pdfIn PDF document text
    • http://wonder-ita.fun/walmart_black_friday_ad_2018wzi0w.pdfIn PDF document text
    • http://manidat.sportsontheweb.net/kixos.pdfIn PDF document text
    • http://grinallex.shop/maize_products_and_usespkey1.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/how_to_fix_samsung_galaxy_tab_3_battery_drain.pdfIn PDF document text
    • http://sagedix.medianewsonline.com/43598551944.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/gfXgcCc/tezexejepopobor.pdfIn PDF document text
    • http://tofotibuwul.sportsontheweb.net/irregular_verbs_past_simple_and_past_participle.pdfIn PDF document text
    • http://revodegasiger.sportsontheweb.net/neil_gaiman_quotes_stardust.pdfIn PDF document text
    • http://copyright-securityx.com/duxokoverakubujuxuv7dw25.pdfIn PDF document text
    • http://praktika-ingenieur.com/lojotufutekivxlfb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c1c719a-02d8-421a-8526-72715975aed9/11523960330.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7196242f-531b-4e03-8caa-68c1c63803a0/polite.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/golabum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8c2cb77-522f-4466-b7bf-d0ae7b2a5062/why_does_it_feel_weird_to_touch_my_belly_button.pdfIn PDF document text
    • http://girofili.myartsonline.com/20360074302.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_off0000e8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AD 5476 bytes
SHA-256: 5a345885bdb81cd5c83ba8944297938afc12fe32f8b221661269e6db5a5dc60e
font_01_sfnt_off0000fb32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB32 11340 bytes
SHA-256: bbaff327d8605abd65885dee09f3c5d655ea2e29f8cb07824bfb353a51a83d60

Open this report in the interactive analyzer, or submit your own file for analysis.