Malicious PDF — malware analysis report

Static analysis result for SHA-256 7132654b9dccaf5f…

MALICIOUS

PDF

76.9 KB Created: 2021-05-15 16:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: decba3873e148e39148975a53fce5ab3 SHA-1: 64551b46126ee302576500576a5f761b34ff00a1 SHA-256: 7132654b9dccaf5f149052a0835bc1ddaa4b865e5dd85b221f4666690fb1c8f7
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. One prominent URL, 'https://maypoin.ru/strik?utm_term=download+sound+drivers+for+windows+7+ultimate+64+bit', suggests a lure to download drivers. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://maypoin.ru/strik?utm_term=download+sound+drivers+for+windows+7+ultimate+64+bit PDF link annotation
    • http://rowowevu.mypressonline.com/biomaterials_textbook.pdfIn PDF document text
    • http://pararapameso.getenjoyment.net/vunanivu.pdfIn PDF document text
    • http://zupebupinumupo.iblogger.org/numeviniwebitakapobafapir.pdfIn PDF document text
    • http://vunekopewode.22web.org/40640250336.pdfIn PDF document text
    • http://negeduji.66ghz.com/tabavifuf.pdfIn PDF document text
    • http://auth02mobility.com/autocratic_leadership_style_definitiongafmt.pdfIn PDF document text
    • http://fofesivolu.iblogger.org/64531147611.pdfIn PDF document text
    • http://puralivivupose.iblogger.org/high_frequency_oscillatory_ventilation_guidelines.pdfIn PDF document text
    • http://roman-holidays.shop/14089465239yq4hm.pdfIn PDF document text
    • http://metinozub.iblogger.org/87081754023.pdfIn PDF document text
    • http://fitatuvepejozo.sportsontheweb.net/celula_eucariota_e_procariota.pdfIn PDF document text
    • http://rent-nout.site/cooper_discoverer_srx_consumer_reportsbq2hc.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/trust_and_obey_piano_sheet_music.pdfIn PDF document text
    • http://predouche.xyz/what_is_the_towing_capacity_of_a_2005_dodge_ram_1500zcfhm.pdfIn PDF document text
    • http://wanuzib.22web.org/types_of_buffer_solution_with_example.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wofuxax.rf.gd/landforms_worksheets_free.pdfIn PDF document text
    • https://f171294f-ed7a-4884-a773-1e826a512430.filesusr.com/ugd/20d861_bb272d43623b41a885c852996893570c.pdf?index=trueIn PDF document text
    • http://jazeduvarepuvas.rf.gd/63406605783.pdfIn PDF document text
    • http://tosefiwaniw.rf.gd/historical_thinking_and_other_unnatural_acts.pdfIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_8d593811cac54db38cb824dab52d711e.pdf?index=trueIn PDF document text
    • https://fd0ef26f-7b8f-4c91-b3b2-19f7ec93487a.filesusr.com/ugd/4174bf_e2e7dfa4bebf4a269b2e6d5b31f06a8a.pdf?index=trueIn PDF document text
    • http://kasinolexol.rf.gd/bebalitabanugiwopepijewax.pdfIn PDF document text
    • https://eecb1da5-82b7-48ef-90e5-6a20895c07e7.filesusr.com/ugd/88a84f_adb7e3fde22c4d098bac2e6f4a1a88ea.pdf?index=trueIn PDF document text
    • http://nazozogev.epizy.com/esl_business_english.pdfIn PDF document text
    • http://duzujowe.epizy.com/hmicfrs_domestic_abuse_report.pdfIn PDF document text
    • https://cf62593c-3f62-494e-9ef9-3c2a63ead7d7.filesusr.com/ugd/93dae2_a3fa067b29ff4673ac08e55fe947edd3.pdf?index=trueIn PDF document text
    • http://rujuramu.rf.gd/solving_and_graphing_inequalities_on_a_number_line_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_off0000ef02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF02 5664 bytes
SHA-256: 581cc0352bb22f95f421d8f6eacf0936e2d5ecf1e46e6c98b0bc3e15401eee2d
font_01_sfnt_off00010261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10261 10412 bytes
SHA-256: 7ac58cd642847e23c96b5645fd6588c62ed998b054c5d96dfbf82df0a7536876