Malicious PDF — malware analysis report

Static analysis result for SHA-256 122d7854d583e3ce…

MALICIOUS

PDF

69.8 KB Created: 2021-02-21 07:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: b695b20d6c23cac81c496c1c170715ce SHA-1: 72c6493936952f7d87db766aff9530d6865e51c7 SHA-256: 122d7854d583e3ce9d0f9f51987f10e803b941dcecd4fe4f9672db7e335c80cc
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, as malicious. It contains numerous external URIs pointing to a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the PDF structure indicate it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/strik?utm_term=thomas+merton+prayer+for+peace PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5fd32ca11fb30.pdfIn PDF document text
    • https://jesisime.weebly.com/uploads/1/3/4/8/134886507/531049.pdfIn PDF document text
    • https://vaturelola.weebly.com/uploads/1/3/4/7/134704713/gazusage.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408863/normal_5ff79da45adf5.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/eBhagiW/xogonevotelanuxiw.pdfIn PDF document text
    • https://cdn.sqhk.co/temisexezoda/hi1ZggS/hamster_shelters_near_me.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/1069559.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470843/normal_6027d327a3f7a.pdfIn PDF document text
    • https://zevijilutijeso.weebly.com/uploads/1/3/4/8/134850931/naxun_bexusiwi_sukotewiv_fazupa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460975/normal_601001b66751b.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/hwoYKVO/gun_war_sound_effects_mp3_free_download.pdfIn PDF document text
    • https://xomuwesakutizid.weebly.com/uploads/1/3/5/3/135393414/tupofinugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383804/normal_601199e1e062a.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/lerezazo/cambridge_igcse_biology_study_and_revision_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/xekemunesa.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/68324724926.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_off0000d655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD655 5272 bytes
SHA-256: 513987f0b77f9770e6fd506a7fbff5a8a4e3ebd18d1c3497c985b7c08123d741
font_01_sfnt_off0000e820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE820 9980 bytes
SHA-256: 124ab2e25e6a7a35f35d5dd4e75ab9b444e566779f65c07ac8899bfee68cd53d

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