Malicious PDF — malware analysis report

Static analysis result for SHA-256 64cc58f83e51829d…

MALICIOUS

PDF

67.5 KB Created: 2021-03-21 01:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: fc3bc0f80093f6413495d4b9a4f8c104 SHA-1: 2be1a702a923fc05ae988fb8b757f8d1282a7f68 SHA-256: 64cc58f83e51829def0f787848d4a259a3d0473763c2229dd5586e86e9a1d974
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by heuristics as a link farm on disposable hosting, indicating a phishing or content-luring attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a spearphishing attachment designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://gimoguvi.ru/wix?keyword=ethnolinguistic+groups+in+the+philippines+pdf PDF link annotation
    • https://cdn.sqhk.co/gufojakig/jdiichj/41231677873.pdfIn PDF document text
    • https://cdn.sqhk.co/kerodamajop/bggjfhI/lexud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421061/normal_604ddaa9e525d.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/descriptive_analysis_spss.pdfIn PDF document text
    • http://gamuxiwami.getenjoyment.net/scw9057g-433_reset_installer_code.pdfIn PDF document text
    • https://cdn.sqhk.co/roxigeve/EHJhjnE/ivan_the_gorilla_paintings_price.pdfIn PDF document text
    • http://giwosesupalu.medianewsonline.com/jadu_ka_ilaj_abdul_salam_bali_english.pdfIn PDF document text
    • http://zuzorovix.scienceontheweb.net/sidoruxat.pdfIn PDF document text
    • https://cdn.sqhk.co/girolivudafo/hhhqycq/pepudebuvebirijemibexomor.pdfIn PDF document text
    • http://ninuwekevap.scienceontheweb.net/el_principe_maquiavelo_frases_por_capitulos.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/gehDg3j/55417404368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412780/normal_5fdc5794509a5.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/luborinizu/material_science_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/299f953f-e595-4b15-b087-878fc0506f46/43559580003.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/aidl_file_in_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eddb956-488f-4bdc-a2dd-5254d5010c29/pusebapepulerepaxedep.pdfIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_f48d3cbf8a6e4c94a4e4d934d5d2ec25.pdf?index=trueIn PDF document text
    • https://9610c43f-1b2a-4a8a-b660-75aaf3908198.filesusr.com/ugd/286fb8_2e6b3ceb61bf42379524357d17ac1991.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/beamer_templates_overleaf.pdfIn PDF document text
    • https://d102a0f2-001f-4998-bb0a-88ac30ac05b5.filesusr.com/ugd/771ea4_cc3a00d207934fb0860357885eab7fbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rorives/sebizilopoma.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/parts_of_the_eye_diagram_worksheet.pdfIn PDF document text
    • https://4c5ad993-366d-4b3a-aa99-9b6f56583180.filesusr.com/ugd/01e791_fcca39b913b447ec9a1a01ede3660389.pdf?index=trueIn 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_off0000ccd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD6 5164 bytes
SHA-256: 6b35b70ada80afccc458e21d5673a84f64b907fdf08e5471dba0d353bd2d7d64
font_01_sfnt_off0000de70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE70 9944 bytes
SHA-256: 8324c85e4b438105f29b7d7a755959660e26b5cb1e7c2c72ae6c318ffe323a28

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