Malicious PDF — malware analysis report

Static analysis result for SHA-256 4788d35563cd9658…

MALICIOUS

PDF

74.7 KB Created: 2021-03-11 00:43:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9f610bdda1d17a3a88908e271863be3c SHA-1: 0638aca7f9b1840b0281b9de7bcc4e4ffda93c55 SHA-256: 4788d35563cd9658587236574f7c85ab27f95760847f92acef83c093bc04dd7c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URI 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 for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/strik?utm_term=how+much+does+a+paintball+party+cost PDF link annotation
    • http://puveputado.sportsontheweb.net/87201180172.pdfIn PDF document text
    • http://pusedoropeseb.66ghz.com/diabetes_guidelines_ada.pdfIn PDF document text
    • http://mevukavotidu.getenjoyment.net/probability_worksheet_high_school.pdfIn PDF document text
    • http://xelirap.22web.org/luromimuvatedixujivamile.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/59928441278.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/14bce05a-bb32-44ff-ba2d-ff9c13a29050/ohs_act_wa_manual_handling.pdfIn PDF document text
    • http://sidakofonol.epizy.com/luter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76bed762-4f2e-4a25-bda6-0ccc2bc33902/zunuxo.pdfIn PDF document text
    • http://lutepotazor.onlinewebshop.net/how_to_use_canon_mg3500_scanner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c53d80-121d-4b52-bdd9-540dd426e5a3/25477623504.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/angular_create_dynamic_template_variable.pdfIn PDF document text
    • http://likijanima.epizy.com/counterweight_guide_shoe.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/bookmark_acrobat_reader_dc.pdfIn PDF document text
    • http://nimanexobubibub.onlinewebshop.net/sap_user_role_assignment_history_table.pdfIn PDF document text
    • http://jezuboteseg.epizy.com/dutozuronos.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/9187893969.pdfIn PDF document text
    • http://nulanajivokavos.rf.gd/90654419093.pdfIn PDF document text
    • http://nureposo.rf.gd/car_coloring_pages_preschool.pdfIn PDF document text
    • http://jotuvuresaserex.rf.gd/69820898834.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/sikisikoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef8d1931-2f68-4da9-b3a6-75b56f2306d2/what_does_pagans_mean.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_off0000e61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE61C 5608 bytes
SHA-256: 80b3a23069efbcf59e136b665945e107dd44e11d05468df08561bd5d4423df2b
font_01_sfnt_off0000f90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90B 10720 bytes
SHA-256: be066a5a8c146821474f5b8fb3b6b008d2a6507f8fdd28be7dde87ee5b20baa0

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