Malicious PDF — malware analysis report

Static analysis result for SHA-256 5033a3db83b79bba…

MALICIOUS

PDF

81.7 KB Created: 2021-04-19 14:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fd1f69ad8b3b55fce54bc9c7dab40502 SHA-1: c661be0d5b5a71eae5ca37052e248d7a51953eb0 SHA-256: 5033a3db83b79bba510b91c5242029324b73426354de6afa040302cad51020e1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary focus on redirecting users to external sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, suggesting a malicious intent to distribute or phish. The ML classifier and ClamAV detection strongly indicate malicious content, likely related to phishing or malware delivery.

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://baarspo.ru/strik?utm_term=arduino+ide+alternative+esp32 PDF link annotation
    • http://fakixigulidol.mywebcommunity.org/41102339949.pdfIn PDF document text
    • http://tewezivigu.22web.org/is_high_blood_pressure_a_symptom_of_covid_19.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/57160337445.pdfIn PDF document text
    • http://kujubawakini.22web.org/all_in_1_hdd_docking_875_manuale_italiano.pdfIn PDF document text
    • http://bazunujovi.scienceontheweb.net/aparato_respiratorio_libro.pdfIn PDF document text
    • http://rodisawikikofu.medianewsonline.com/triveni_turbines_campus_placement_papers.pdfIn PDF document text
    • https://cdn.sqhk.co/lepowabog/UxijdM0/45777489183.pdfIn PDF document text
    • http://biwumani.mywebcommunity.org/ielts_speaking_exam_questions_and_answers.pdfIn PDF document text
    • http://tisibodonal.22web.org/ketevasetilor.pdfIn PDF document text
    • http://noxiliko.iblogger.org/1000_microfarad_25v_capacitor_datasheet.pdfIn PDF document text
    • https://cdn.sqhk.co/donuvoduvedo/geO3Tjb/5545923558.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/declaracion_universal_de_los_derechos_humanos_1948_articulos.pdfIn PDF document text
    • https://17673d3b-e5d0-4e0e-8211-f079fadf35f5.filesusr.com/ugd/13ae68_0aa26a4961ba46a1a6f27404152f73e0.pdf?index=trueIn PDF document text
    • http://pumumiz.epizy.com/dapowiluzojegasopad.pdfIn PDF document text
    • https://711a90e7-97f2-4eab-8690-3003ec1e9b64.filesusr.com/ugd/a0905b_f7453f3eef3a46f88b8cf08f2c86c8c0.pdf?index=trueIn PDF document text
    • https://ad177677-9664-42cd-9bf2-17a10eef6e1d.filesusr.com/ugd/f8915e_f5436c4d239b4b85aafde1c39eb30db3.pdf?index=trueIn PDF document text
    • http://gototura.myartsonline.com/besame_mucho_partitura_guitarra.pdfIn PDF document text
    • http://musarozopod.rf.gd/inter_milan_team_sheet.pdfIn PDF document text
    • https://bdee3e82-1fe6-4084-b289-f15f5249f83e.filesusr.com/ugd/749937_0187a7b7c9ee4f38b271e5b3decc2c69.pdf?index=trueIn PDF document text
    • http://kafakakuwif.rf.gd/agreement_form_sample.pdfIn PDF document text
    • http://wojibikifi.myartsonline.com/49030227389.pdfIn PDF document text
    • http://desujiruvomeb.myartsonline.com/petadijebedopixuvele.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/kupikixi.pdfIn PDF document text
    • http://xulitapaxi.rf.gd/miweweteligesopif.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_off0000ffe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 5296 bytes
SHA-256: 34a714116f73a9519f15b38f0fcee3a6e66cc4ab6702d97c5e8a5dc2b9b817d4
font_01_sfnt_off000111fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FB 11592 bytes
SHA-256: b629b3ac9ec8b675c39bd701fa3a1038c334deafda594dc8999f77382f8aa05c

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