Malicious PDF — malware analysis report

Static analysis result for SHA-256 b328a7d1e967867c…

MALICIOUS

PDF

73.0 KB Created: 2021-03-04 04:51:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 02ff78476e3a18a68516f0acf7c406a5 SHA-1: 50cabc41ce2e853bdf9b5c03f07c1e4ab18d982d SHA-256: b328a7d1e967867c3e40e7c914891dc18d26423e467a34309cb6def2a3a71b98
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to contain keywords related to product sales, likely as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/strik?utm_term=taylormade+r15+driver+for+sale+uk PDF link annotation
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/1007240.pdfIn PDF document text
    • https://gunobapeve.weebly.com/uploads/1/3/4/7/134706327/5bf19dd2dcdcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_602896d504f9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462986/normal_603b68280d672.pdfIn PDF document text
    • http://mavisuvegepufi.iblogger.org/sistema_endocrino_que_es_y_su_funcion.pdfIn PDF document text
    • https://kitozegukelod.weebly.com/uploads/1/3/6/0/136056839/5373634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463788/normal_6006450f4481f.pdfIn PDF document text
    • http://pubggaming.online/wunidijotekizuxmznmj.pdfIn PDF document text
    • http://nazhivy.net/34121528453syd2k.pdfIn PDF document text
    • https://likizosuzi.weebly.com/uploads/1/3/4/8/134886942/lirefimidanawojuwefa.pdfIn PDF document text
    • http://tricitysikhs.com/15124675468k94un.pdfIn PDF document text
    • http://majelogajizivo.iblogger.org/78427850243.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471723/normal_5ff8b08e5f9c1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bodufusuviv.epizy.com/balance_sheet_account_reconciliations_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/online_police_bharti_form_2019.pdfIn PDF document text
    • http://bonizeza.epizy.com/quickbooks_payments_received_report.pdfIn PDF document text
    • http://rusakarazixano.epizy.com/88486965443.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/free_apple_id_bypass.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF44 5404 bytes
SHA-256: 6ae19f0ad49f8b754223c889abccccac2b7f6297769b4463f4c17f53956fc92a
font_01_sfnt_off0000f1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AE 10872 bytes
SHA-256: 4ae3839f89dca88b374952ebd9116e28e0c6ce2d92e6c29857d79504752d9f83

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