Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ae1dfbeca06ea3b…

MALICIOUS

PDF

71.4 KB Created: 2021-03-03 01:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0cb341d5f0192b8406917b863fb449d5 SHA-1: 3cf989cb84f7cf524d9f1b5357177aa6ab3478cd SHA-256: 4ae1dfbeca06ea3b23642f2994d85a4888846090dc6308e39a0be3e6f7855851
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=how+to+use+magimix+nespresso+milk+frother PDF link annotation
    • http://1gusevshop.space/244148124186zy18.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/hjjfjbR/25094369521.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/dunkin_donuts_blueberry_munchkin_recipe.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/what_does_heavy_rain_sound_like.pdfIn PDF document text
    • https://xexidizufom.weebly.com/uploads/1/3/4/5/134508107/d6509f50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480414/normal_603bfdd4186d2.pdfIn PDF document text
    • http://laulu-go.ru/how_does_keurig_elite_make_iced_coffeeqfpc3.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxedanafowa/Mgjjejg/gidikufubova.pdfIn PDF document text
    • https://cdn.sqhk.co/letareximo/mijhenP/53384840048.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5fd038c295909.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeborawaleko.atwebpages.com/vsepr_molecular_geometry_worksheet_answers.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/line_of_succession_rules.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/saga_cancin_de_hielo_y_fuego_comprar.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/shanghai_disneyland_guide_map.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/pre_cook_lasagna_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/what_are_the_objectives_of_aggregate_planning.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_off0000d92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD92C 5500 bytes
SHA-256: 2fc5b29a4a19932cde71981479c643a4fec89aca409d48f39063120768a8a6c5
font_01_sfnt_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 10748 bytes
SHA-256: b65b3fb5f35ae118663c6941785c004e8b8f1660e711616fdfc90f2c78372fc4

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