Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b265384e68e591b…

MALICIOUS

PDF

73.8 KB Created: 2021-03-11 14:22:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5ff4069bdd1fe439911d00026cec79c4 SHA-1: 20000dcf9e6a91e0744ffb233c250784b80c4086 SHA-256: 0b265384e68e591beda3a66c52f9759ab200a0533db8ce1da78d54be56e1aa23
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://botokaw.ru/award?keyword=candy+chromatography+project+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4389387/normal_5fd1aadd2dc3e.pdfIn PDF document text
    • http://tonevagewalilu.medianewsonline.com/honeywell_wireless_focuspro_6000_system_kit.pdfIn PDF document text
    • http://miwasigal.mywebcommunity.org/emerson_thermostat_manual_1f80-0261.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495684/normal_5fcd568ceb83a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468289/normal_5fdf99664da60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373240/normal_5fed2f0077a19.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/dixaleko/42788764694.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fd4f7c5-b343-461f-98e2-e438ef4fc73e/what_does_str_mean_on_my_remote.pdfIn PDF document text
    • http://satawakerexe.atwebpages.com/dukagozopujusezudolafud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2de83f53-958d-4e6a-ab84-8c544559a5ac/89546386412.pdfIn PDF document text
    • http://wepiliga.epizy.com/xavugexudapotuniwapinev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/074a8594-4d2f-4215-b2be-80cb82d446e7/suzuki_piano_book_1_songs_list.pdfIn PDF document text
    • http://wojixefem.epizy.com/acdsee_software_free_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/868d0dc5-4027-4cd0-8f19-1ac2751bf388/industrial_revolution_impact_on_graphic_design.pdfIn PDF document text
    • http://xemunebo.atwebpages.com/anticorpos_antinucleares.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/29324443012.pdfIn PDF document text
    • http://puzenufamem.rf.gd/gettysburg_battlefield_tour_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b999b43d-e8c9-445d-8a82-7f1023271831/what_are_the_stages_of_development_in_a_child.pdfIn PDF document text
    • http://pigutun.myartsonline.com/62742016540.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_off0000e4c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C7 5444 bytes
SHA-256: f95d843fed7d457c2122732157c1681cfca475d99bf13127cd273dc7be10b477
font_01_sfnt_off0000f730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF730 10180 bytes
SHA-256: 40003e9085496b0a1233f42a575280bcc6858cb0ff23de5bc648504bc2c4bbfc

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