Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e678d78e9dbcaab…

MALICIOUS

PDF

86.0 KB Created: 2021-03-16 07:11:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 03685b0b91ffa0ad0f051dd7188ee249 SHA-1: 0ddf87850af61c66f94f7f0e2caed206c14e7522 SHA-256: 5e678d78e9dbcaab649cfb10676c9dea53516597528e1af3c3f64e63a8fc2e4b
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, disguised as a book about making money. This is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, and the PDF structure suggests it's designed to exploit vulnerabilities or redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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://dafemum.ru/wix?keyword=el+arte+de+hacer+dinero+pdf+libro+completo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4489733/normal_5fd902ea21842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411479/normal_5feaf1f96fe65.pdfIn PDF document text
    • http://rezokivi.medianewsonline.com/ganaximusifix.pdfIn PDF document text
    • https://marezupudi.weebly.com/uploads/1/3/0/8/130874377/2026789.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425217/normal_5fe31b5704f0f.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/can_i_print_a_fedex_shipping_label.pdfIn PDF document text
    • https://cdn.sqhk.co/migixurej/gfQghis/ninja_shadow_warrior_hero_ninja_fighting_games_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/iedYghm/32088292742.pdfIn PDF document text
    • https://pepulumowuso.weebly.com/uploads/1/3/2/6/132681954/saponoxifokebefovawa.pdfIn PDF document text
    • https://cdn.sqhk.co/wuladupuzo/jNiaID3/netflix_android_box_hd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499636/normal_60054e4a9aaf8.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/vuxonelovaxezokugowi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa22bb36-5f5c-4332-9519-0da420739f8d/bufepotu.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/xazupiperemesotumeriku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7023c191-cc39-46e3-b30d-3af9cace455a/timex_t309t_manual.pdfIn PDF document text
    • http://nevabaza.atwebpages.com/nibupejizenapamutofelew.pdfIn PDF document text
    • https://s3.amazonaws.com/pusixa/masinaze.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/gugagorojexovutalopizad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63c907a9-dc35-4f72-ad8a-d7b33968536a/restful_web_service_json_example_in_c.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/nomokul.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCA 5316 bytes
SHA-256: 5a5fd42ebf09def5fbf0d74d29dd1c1c0ecc28a5917c70b50431d2c0dcad454f
font_01_sfnt_off0000fda9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA9 4816 bytes
SHA-256: deb14a69cb5f44b4092fb641fa0ee24ab6c41812d8d588760ae0e056ee5544b8
font_02_sfnt_off00010f54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F54 10716 bytes
SHA-256: 22385a68e1b499b1441dfaa443f86e1daa90c7090a45aa3f2e68d0c7dd52978a
font_03_sfnt_off000132d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D3 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f