Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d3eca8e98066188…

MALICIOUS

PDF

181.4 KB Created: 2021-03-06 22:50:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7652a56f89c59c8b2015e14f6eefa9bb SHA-1: f98317d067529f377ed29a82d81c4efbc33f5a64 SHA-256: 5d3eca8e98066188873e8c31a25da3c77798690b7a3264b7191608cf12fb78bc
134 Risk Score

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 phishing or malware delivery. Although no explicit script was found, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://nipisod.ru/wix?keyword=nj+high+school+wrestling+full+circle PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483836/normal_60068f89817ce.pdfIn PDF document text
    • http://pedazupemadid.22web.org/vafopowutozog.pdfIn PDF document text
    • http://banikomapi.22web.org/95567029620.pdfIn PDF document text
    • http://xexisutufas.iblogger.org/ghosts_of_saltmarsh_dm_guide.pdfIn PDF document text
    • http://sesopuligu.iblogger.org/tadawuritupot.pdfIn PDF document text
    • http://takotonefajale.22web.org/thompson_history_of_south_africa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426060/normal_5ff18d3d4e8b9.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/fidobakipivogit/information_about_computer_science_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f87057ce-9fbf-4d0c-a1c9-17f16f96be08/navien_hot_water_boiler_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a93746-ea11-415a-ae5c-6dc93d4ec99c/what_size_file_to_sharpen_chainsaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf355c8-1398-442f-8036-8bc7225ce348/osha_tailgate_safety_topics_construction.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/77325193950.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5db945be-a714-4470-8a53-153b577d6920/taco_bell_soft_taco_shell_nutrition.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/gooners_guide_football_predictions.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/74340276622.pdfIn PDF document text
    • http://toxijojow.epizy.com/beginner_bow_guide_mhw.pdfIn PDF document text
    • http://kidikawemo.epizy.com/71855535975.pdfIn PDF document text
    • http://zorepate.epizy.com/down_to_the_river_to_pray_banjo_tab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac790b37-1267-4692-82bb-04e51e5d0be4/10678219529.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_off00029032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29032 5068 bytes
SHA-256: 35673b26519346ecab8c825af7ad4d3ac92fd7444f738156a1b26ff8d91b65eb
font_01_sfnt_off0002a192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A192 11112 bytes
SHA-256: 7dfdb8e97e3dedf637e2afeb99dfb92731f16dc23c631726ef4fa4bc84b6e0dd

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