Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce03a8cf12fe70f9…

MALICIOUS

PDF

78.8 KB Created: 2021-03-24 03:12:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0f6e7d387a8ee5d782d9b68a5d8c0f7e SHA-1: 20edd7397d7a5a5da5245c264ca68281bd9ed4b7 SHA-256: ce03a8cf12fe70f91a3f4a2c04e6061ce6b1fc94380ccad265abcb3f89490fc8
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=bluetooth+driver+for+windows+8.+1+free PDF link annotation
    • http://xuvaxujogilo.mygamesonline.org/aircraft_accident_investigation_course.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/free_printable_maths_worksheets_for_11_year_olds.pdfIn PDF document text
    • http://lotukaguw.sportsontheweb.net/4584814877.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/lolakukejilixetuzefixag.pdfIn PDF document text
    • http://vofufime.mypressonline.com/dnd_5e_druid_spells.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473926/normal_602b577623889.pdfIn PDF document text
    • https://vilinumatilaji.weebly.com/uploads/1/3/2/7/132740241/degima.pdfIn PDF document text
    • https://gafalevomunu.weebly.com/uploads/1/3/4/2/134235362/4698259.pdfIn PDF document text
    • http://wopexobow.mywebcommunity.org/52894095915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380523/normal_5fd1a2ac34ea0.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/a440e13c-781f-41dc-94de-a4c8ba604311/ap_calculus_ab_2018_frq.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/368720da-f334-4f0e-aa54-ccd81b614c0c/affirming_diversity_the_sociopolitical_context_of_multicultural_education_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9d76e22-2e40-43c2-bfcb-fc2fb9fe32a2/how_to_find_maximum_acceleration_calculus.pdfIn PDF document text
    • http://taguloxutenafol.myartsonline.com/aspectos_biologicos_y_psicologicos_de_la_sexualidad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68da1588-108d-4372-b96e-d8e32555db21/21898533209.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/why_isnt_my_sentry_safe_opening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/495b4466-6261-4c5c-b4ce-ebe33cb6c811/xazanubukaginiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868969ba-a854-4e58-9321-f67f7cd9d5c5/netutavuriwefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bafd3ec-42d3-43e7-9302-17afd8357584/what_is_basic_process_control_system.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_off0000f5e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E0 5264 bytes
SHA-256: 6269eaf1e87b77b6cf9996766c118092bb442c2c55a77ce2136789658b6cea1f
font_01_sfnt_off000107ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107EA 11076 bytes
SHA-256: 4b09ef1363381f7a258a86715b1c982c0f3dbefe58bf51b30fa8dc410fe67e39

Open this report in the interactive analyzer, or submit your own file for analysis.