Malicious PDF — malware analysis report

Static analysis result for SHA-256 109e820bf086384e…

MALICIOUS

PDF

77.2 KB Created: 2021-03-13 20:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 30188611c2799799659797c0fd2ccb7b SHA-1: 45ea4a5cc4af3edce76dfe804712ad1a3ad8939f SHA-256: 109e820bf086384efbc24c781471fd814002669711532b6280feb6527fe6c741
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=wicca+for+beginners PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425921/normal_5fcd346999265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403543/normal_600ef7a57f606.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415537/normal_5ff5c65d0ec8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371787/normal_5fd2e40538323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408482/normal_6045bfe29d1a6.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/bavivofusevi.pdfIn PDF document text
    • http://tadugebakonuged.getenjoyment.net/pathophysiology_of_congenital_hypothyroidism.pdfIn PDF document text
    • http://pemufosapakem.mypressonline.com/jio_mobile_video_calling_baat_karne_wala_apps.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380219/normal_5feda2d7c9820.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419628/normal_602728a81f5d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462993/normal_6042706fc1135.pdfIn PDF document text
    • http://vumogegotawugub.mypressonline.com/nonton_film_a_series_of_unfortunate_events_2004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/kuzepumolofajoxupejata.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/google_sheets_sumif_not_error.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/kindle_fire_hd_7_case_2nd_generation.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/nufoxubotugomasatonetu.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/71219749737.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0932e1fd-af03-41ad-8f57-1bfad711282d/28636052835.pdfIn PDF document text
    • http://vawirir.atwebpages.com/seresisinudubator.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/what_is_an_objective_theory_of_welfare.pdfIn PDF document text
    • http://jirabasojexosud.atwebpages.com/13823740040.pdfIn PDF document text
    • http://benamow.myartsonline.com/possessivartikel_im_nominativ_bungen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42af0914-63de-4e8a-8d44-142219fe7726/gotomupapofo.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_off0000f007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF007 5168 bytes
SHA-256: 06406116ff501af280ad63dedb61ca1f405c40dd7a2413adc95155f7f5725270
font_01_sfnt_off000101c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 11244 bytes
SHA-256: 0f43997e7f68a7de9d1ce20d51fb753c338dc9e455a630f70a4582264db32acb

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