Malicious PDF — malware analysis report

Static analysis result for SHA-256 3de6ae028fbe3399…

MALICIOUS

PDF

84.1 KB Created: 2021-04-05 16:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aa7251ee66baa980c19b56a8766b1960 SHA-1: bb7d9d6abbb521468baf40a8a4372e85d579da3e SHA-256: 3de6ae028fbe3399958d8aa9c260ab01f8e80c8828a183ee3f7c9dfc1789c7a9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 6

  • 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 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.
  • 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://ponafet.ru/123?utm_term=arsenio+lupin+serie+tv PDF link annotation
    • https://lanigitekepag.weebly.com/uploads/1/3/4/3/134395773/5980378.pdfIn PDF document text
    • http://tubujagowip.iblogger.org/39101136042.pdfIn PDF document text
    • http://kopawaruda.22web.org/textsheet_for_course_hero.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/7e089034c1.pdfIn PDF document text
    • https://zakisegozazamig.weebly.com/uploads/1/3/4/3/134346543/firali_gigefe_tufonofi.pdfIn PDF document text
    • http://lekujajivuvire.iblogger.org/livros_sobre_meio_ambiente_e_sustentabilidade.pdfIn PDF document text
    • https://jufasoxoko.weebly.com/uploads/1/3/5/3/135315704/rufulok.pdfIn PDF document text
    • https://gapurosudezejug.weebly.com/uploads/1/3/5/9/135965954/sujoxuje-fadewu.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/49713b43-8e8a-4d3b-a278-43c66b04d228/wordpress_show_login_history.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/cyberflix_android_requirements.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae88a904-17ce-4db0-b25b-d92041755c44/97002774625.pdfIn PDF document text
    • http://wifudozakiteg.epizy.com/gupamipolikilajelixofa.pdfIn PDF document text
    • http://larojoxejatu.epizy.com/80387623695.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b090279d-7b50-46dd-ab16-3ae42536debd/wepaterimomokaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d17964-b4b7-4d2c-abeb-4b7d20c4267a/nukabajupaditivaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3417cd-5705-45df-b0d2-ca1d74c5ce46/how_to_use_black_and_decker_toaster_oven_air_fryer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e60071f8-cceb-4b78-b66f-5dc387239126/resumen_del_capitulo_4_de_batallas_en_el_desierto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e678b82-bd00-4d3d-8e53-f548de8e1637/dunufafaruwedujawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e771347e-1da2-4ab0-b58d-41b822bd290f/97528200716.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/74044240645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b697d103-e0a0-42a1-bedc-66c096386c08/how_to_earn_money_from_home_small_business.pdfIn PDF document text
    • http://rejoxon.rf.gd/baixar_livro_historia_do_brasil.pdfIn PDF document text
    • http://fonirezasirutaz.epizy.com/sampurna_marathi_aarti_sangrah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b9bfb41-2a35-4799-8367-d3f4c16c09e1/lefadex.pdfIn PDF document text
    • http://rabazefobozaxa.epizy.com/bel_canto_book.pdfIn PDF document text
    • http://setuvufijub.epizy.com/chamelephon_for_pc.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_off0001084e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1084E 4652 bytes
SHA-256: b315f4ec4d118f594183cf512c2d4701fa43c74fcbf58409861e96413947f5d7
font_01_sfnt_off00011836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11836 12844 bytes
SHA-256: d3cdb58e2d5df2b64c1820aa608985f3f124a6e2f604e59144c55c6c55097629