Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3a3d7f696a99b71…

MALICIOUS

PDF

81.2 KB Created: 2021-04-18 18:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8504abce76c2e1deb2037eaffe33a79a SHA-1: 9948615ca6740adaca59911e828d1595010679ca SHA-256: e3a3d7f696a99b71cc58ab5f245790fe4013fa89f80adc68cc822a4a93e3a5cd
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The primary URL, 'https://fokemale.ru/strik?utm_term=what+did+galileo+discover+about+jupiter', is presented as a search result lure. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/strik?utm_term=what+did+galileo+discover+about+jupiter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366365/normal_601583c027480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414871/normal_60182f44c424b.pdfIn PDF document text
    • http://pelubexeto.getenjoyment.net/indefinite_article_examples.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471091/normal_5fddc0c3cc998.pdfIn PDF document text
    • http://zupeset.22web.org/volkswagen_transporter_type_2_workshop_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464521/normal_6028f5939a0ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408180/normal_60375e7aef667.pdfIn PDF document text
    • http://fulusixavopowem.iblogger.org/causas_de_aneurisma_cerebral.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/pamibikipa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_604833cb28a72.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/79345770270.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5fce6b7281873.pdfIn PDF document text
    • http://apparently-home.com/ffxiv_bard_perform_musicw2ap1.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/grammaire_franaise_exercices_corrigs.pdfIn PDF document text
    • http://momentshop.space/16065964359nlqs7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394071/normal_602d75b1bdc89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5ffea5dd613e1.pdfIn PDF document text
    • http://tojumuwuluso.iblogger.org/zotefamuwefebifokidum.pdfIn PDF document text
    • http://pagebake.com/kepevezesalogubibuvlwn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465690/normal_5ff54c0da81b1.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://s3.amazonaws.com/punurum/webview_background_transparent_android.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/acls_test_questions.pdfIn PDF document text
    • http://vagimosaperijoz.epizy.com/business_plan_report_sample.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/how_to_reset_sentry_safe_password.pdfIn PDF document text
    • http://tewarenibimek.rf.gd/78669075843.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_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 5400 bytes
SHA-256: 284fa0baa50925d1973e780cc5d47381327e04dee2fdef4a0c89a7de1ec2c99b
font_01_sfnt_off000103ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 11004 bytes
SHA-256: 4f504aa55d873c92abe83342f6cb1da9af946c82d6642f06a102fe52ca117773
font_02_sfnt_off000128e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E2 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333