Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb425f7b627fe21d…

MALICIOUS

PDF

79.1 KB Created: 2021-04-02 15:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5031be40a53d84d2e503e3e41b289dbc SHA-1: 762e0944aa5828e6fefe14faac034ed1d62862a6 SHA-256: eb425f7b627fe21d1e6c9f6c266ae4391d1c2d589aa7be85b8716779cd2fd67a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/strik?utm_term=ridgeway+grandfather+clock+repair PDF link annotation
    • http://wrinklestiltskin.com/sat_practice_test_8_section_3_answersrr0t3.pdfIn PDF document text
    • http://xowutopokelu.iblogger.org/botany_for_degree_students_algae_free_download.pdfIn PDF document text
    • http://luwimifamofuper.iblogger.org/kedezar.pdfIn PDF document text
    • http://manybigs.space/mebidigimurxtoad.pdfIn PDF document text
    • https://mugabezimezik.weebly.com/uploads/1/3/4/2/134235171/587279.pdfIn PDF document text
    • https://fusofajo.weebly.com/uploads/1/3/1/4/131438110/fidodefezev.pdfIn PDF document text
    • http://tajumizigareni.iblogger.org/android_studio_online_tool.pdfIn PDF document text
    • https://ratudizog.weebly.com/uploads/1/3/5/3/135323835/dasapado.pdfIn PDF document text
    • http://idealslim-italiaoficial.site/pivigibavrshz.pdfIn PDF document text
    • https://kuruxeronujupo.weebly.com/uploads/1/3/4/4/134477992/3649159f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokemupuwife.rf.gd/58816779535.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ad6a37-36b5-415a-b682-91bd0e9f71a4/envirotemp_electric_water_heater_parts.pdfIn PDF document text
    • http://butozijiko.epizy.com/bringing_out_the_best_in_everyone_you_coach.pdfIn PDF document text
    • http://pegesij.rf.gd/wodewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9573aa3b-0972-412f-ba99-d00d3f22883d/32082623362.pdfIn PDF document text
    • http://kubotupixa.rf.gd/muxigobapewesaxadowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/678dfb3d-9b9f-401a-9a9b-f77253e1eff4/copm_canadian_occupational_performance_measure.pdfIn PDF document text
    • http://jotavuwejopilo.rf.gd/business_sales_letter_sample.pdfIn PDF document text
    • http://gudanomakorake.epizy.com/ancien_regime_et_la_revolution.pdfIn PDF document text
    • http://podaviloridi.rf.gd/72483186805.pdfIn PDF document text
    • http://pawutewitozi.epizy.com/mimuturu.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_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 5504 bytes
SHA-256: 1d8d1e1aaa1cd8b5eb57fe36bb27bbc3948e471e973ac8cac60c4e5e9953fc1a
font_01_sfnt_off00010ad9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AD9 10700 bytes
SHA-256: 0b112d85c468af18564d1a3fdcbe0574998d4b5af7aaab88b70144946c2ba99b

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