Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dc644d9afee495c…

MALICIOUS

PDF

66.0 KB Created: 2021-02-25 13:41:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c02e7e5a94f1bc852bacb6b691ac6a97 SHA-1: 6838ac9face300d43ae181e711ff5f851c4e1f2d SHA-256: 5dc644d9afee495c4ef539c1ed1566905d4bca044c89cd23589334c06e1f7a7f
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/strik?utm_term=biology+the+race+to+discover+dna+review+sheet+answers PDF link annotation
    • http://lareluso.iblogger.org/63059778568.pdfIn PDF document text
    • http://teenagetutor.net/40964076102s91y7.pdfIn PDF document text
    • http://nakanilo.club/how_do_i_get_all_the_channels_on_dish_guidebvz04.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/gjUyiiT/european_war_2_download_game.pdfIn PDF document text
    • http://sakulog.sportsontheweb.net/what_did_the_government_do_to_help_the_great_depression.pdfIn PDF document text
    • https://vevuduwas.weebly.com/uploads/1/3/0/7/130775740/5439898.pdfIn PDF document text
    • https://luvisumor.weebly.com/uploads/1/3/5/3/135390586/zopupevili-risozowanife-jogepilemowe-zopatujijatetuv.pdfIn PDF document text
    • https://guwevene.weebly.com/uploads/1/3/1/4/131437413/lelovajinow.pdfIn PDF document text
    • https://cdn.sqhk.co/jipuxoxukul/sajfkR5/ratawevelozipemimuwefa.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/tid4ngh/paper_bowling_pin_shooting_targets.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/tekukisisog.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/saziwijaxodav/27990750455.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/81740354527.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/wujerubenofuk.pdfIn PDF document text
    • http://kedisijusa.onlinewebshop.net/how_do_i_calculate_pool_pump_flow_rate.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_off0000c5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5FE 5504 bytes
SHA-256: f0b24b66a7c27c672f8a6c554780ace988869c9576a3c5a4b413a45605d72aa5
font_01_sfnt_off0000d8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C7 10104 bytes
SHA-256: f1667dd1b1689d5f13c05f6325621b7f9b7aa98a167289cd75a3da43e296baae

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