Malicious PDF — malware analysis report

Static analysis result for SHA-256 415e14657de06f8c…

MALICIOUS

PDF

75.5 KB Created: 2021-02-08 05:32:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b2f523ec063aac3b6e3bec491b64f0ab SHA-1: c4d7a9b7ea82e76dbd4f26b9a8a9b46bc8959e22 SHA-256: 415e14657de06f8c32017202a53e61b6cccf73cd4e9cc34715c134905e609ac1
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or SEO link farming. No scripts were extracted, but the presence of numerous external links suggests the document's primary purpose is to redirect users to potentially harmful websites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/123?utm_term=uremic+encephalopathy+nursing+care+plan In PDF document text
    • https://cdn.sqhk.co/keragipiki/ibLjigg/choppa_style_twerk_song.pdfIn PDF document text
    • https://zunenevalomedo.weebly.com/uploads/1/3/4/8/134855990/8748983.pdfIn PDF document text
    • https://cdn.sqhk.co/maxegugej/jcHVgh6/elton_john_songs_youtube_i_m_still_standing.pdfIn PDF document text
    • http://english-10.site/cercle_de_la_forme_chatillon88lpp.pdfIn PDF document text
    • http://steelsho3.club/fanawiwonifenuxnyt5o.pdfIn PDF document text
    • https://cdn.sqhk.co/leperanurosi/dhihbD7/project_manager_certification_online.pdfIn PDF document text
    • https://cdn.sqhk.co/votijavos/gdkjjjE/13038159715.pdfIn PDF document text
    • http://politach.com/92571749051b2lt1.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/102e15c02.pdfIn PDF document text
    • http://fiwuwoxas.22web.org/12748981003.pdfIn PDF document text
    • https://fanamavikere.weebly.com/uploads/1/3/4/6/134610997/tepiwabefepav.pdfIn PDF document text
    • https://betixajivuf.weebly.com/uploads/1/3/4/9/134900014/depasu.pdfIn PDF document text
    • https://levukuwaxumofet.weebly.com/uploads/1/3/1/3/131383949/6459091.pdfIn PDF document text
    • http://rubeatyshop.xyz/cadence_allegro_16._6g1v91.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xazarujokemus/sefozefefojipasopenojalu.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/bisowiw.pdfIn PDF document text
    • https://s3.amazonaws.com/tesasubawalozan/24596129018.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/esic_maternity_leave_form_21.pdfIn PDF document text
    • http://laxolivavaru.epizy.com/tecnologia_de_informao_na_logistica.pdfIn PDF document text
    • http://nazozogev.epizy.com/chinese_drama_subtitle_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/data_analytics_website_template_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E4 5320 bytes
SHA-256: 30e59d7f8e40a035bd52eb7884269f0acfaa9d772110854061c87c31514c4324
font_01_sfnt_off0000ebcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCD 11384 bytes
SHA-256: 60b1d55812c7ae33db74022a4aa894b5ac0817b6665a8ee14fa36cca0b0345dd
font_02_sfnt_off000111c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111C1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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