Malicious PDF — malware analysis report

Static analysis result for SHA-256 29ccf182d47e3c84…

MALICIOUS

PDF

84.5 KB Created: 2021-03-08 23:29:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: b8530b6cbc4c6efec8958da6ea56a7be SHA-1: 82ea9ae028c2b7234816e0246b5c951b2004e807 SHA-256: 29ccf182d47e3c848411a30a90c196f2b9d838217daca0e0af5f4d60c0d6f028
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the 'link farm' heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/strik?utm_term=the+house+with+a+clock+in+its+walls+trailer+2018 PDF link annotation
    • http://teenagetutor.net/online_continue_admission_form_aiouhfli6.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/hamilton_beach_flexbrew_coffee_maker_single_serve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391898/normal_5ff92c0898a98.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/surikuled.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/banunigesavujijejivalemux.pdfIn PDF document text
    • http://bewilotaweje.mywebcommunity.org/quotes_from_the_adoration_of_jenna_fox.pdfIn PDF document text
    • http://esportzmlevent.com/lonely_planet_cambodia_guidewcgqf.pdfIn PDF document text
    • http://artelamp.store/62113693592yv8g0.pdfIn PDF document text
    • http://mujubow.getenjoyment.net/living_cleansing_balm_tm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476146/normal_601ad77a016ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453764/normal_60125f7a35d64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484821/normal_601643d7e956e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370080/normal_5ff988deb416b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jipudovisubu.rf.gd/tiwunazowufamokudem.pdfIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_019d55203a014d06aa21f6a5f66c46b2.pdf?index=trueIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_4b658d5dd95b4941a59d782f82cbfed9.pdf?index=trueIn PDF document text
    • http://javidukasomeg.epizy.com/caste_list_in_ap.pdfIn PDF document text
    • http://zuwosopawekaz.rf.gd/present_progressive_verbs_worksheet.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_off00010d9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9C 5512 bytes
SHA-256: 1b8adc057e48b0f165260dae7de79bc9675a3206b82770c1de0e993db76be5d8
font_01_sfnt_off0001206a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1206A 10776 bytes
SHA-256: 6bc73c1d497bcdebba3e7c6c5acd3539a374c0db8ff53095160bb8d1dfcf57bb

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