Malicious PDF — malware analysis report

Static analysis result for SHA-256 59141fc6def832a4…

MALICIOUS

PDF

75.5 KB Created: 2021-03-07 04:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4855482fa49097b70ea26f3884e7badf SHA-1: 57721e3ac0f04fd585da9ffbe46833ecf5b815aa SHA-256: 59141fc6def832a4a2f45f34e7007a6f471981bee70d8e493878af9ba62bbd2e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://vilenefex.ru/strik?utm_term=what+is+heat+fusion PDF link annotation
    • http://ranomurivokav.22web.org/dogowukob.pdfIn PDF document text
    • https://dagakaxogofawi.weebly.com/uploads/1/3/4/6/134699425/7101232.pdfIn PDF document text
    • http://naturalik.fun/21477444078856bp.pdfIn PDF document text
    • http://datinge.site/autocad_lt_2015_offline_installerwjff3.pdfIn PDF document text
    • http://inter-kalinka.ru/gta_v_watch_dogs_2_mod5em9c.pdfIn PDF document text
    • http://tradestaroffice.com/iatkos_ec_download3nyis.pdfIn PDF document text
    • http://hook-up.fun/neboz6zyd5.pdfIn PDF document text
    • https://geliwesirodired.weebly.com/uploads/1/3/1/3/131382982/6362387.pdfIn PDF document text
    • http://naturapple.space/1009120985418dhw.pdfIn PDF document text
    • http://biolinkus.me/tozunez3vyo.pdfIn PDF document text
    • http://wwbook.org/top_penny_stocks_yahoo_financeheyge.pdfIn PDF document text
    • http://easterthjg.com/4673648755q4w4i.pdfIn PDF document text
    • http://slimitalia.space/what_is_peaceful_life8kgpy.pdfIn PDF document text
    • http://reduslim-buy.site/livros_de_psicologia_comportamental_para_iniciantesxl8lw.pdfIn PDF document text
    • http://changepass.online/how_to_do_rossi_nailsgdqi3.pdfIn PDF document text
    • https://vufemare.weebly.com/uploads/1/3/4/8/134855896/3093275.pdfIn PDF document text
    • https://muvisodujop.weebly.com/uploads/1/3/4/3/134358588/gelixivos.pdfIn PDF document text
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/dowil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/zowuxakefixigowuva.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/panacea_biotec_annual_report_2019.pdfIn PDF document text
    • http://xajugonagegef.epizy.com/hoover_max_extract_all_terrain_leaking.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/kemazebe.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/51857557997.pdfIn PDF document text
    • http://wuzatefiroko.epizy.com/what_does_it_mean_to_be_a_purple_cow.pdfIn PDF document text
    • http://fegegarovepib.epizy.com/22363036906.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/definition_of_forensic_psychology.pdfIn PDF document text
    • http://xaselivubol.rf.gd/sony_ht-ct260_specs.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_off0000e8f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F0 4740 bytes
SHA-256: 0f06b5a52be2c0874c036baffa356ff3f0270657f1b0159b39f07eee2c076abb
font_01_sfnt_off0000f920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF920 11684 bytes
SHA-256: c778106c0f9138e220c372a56b3e5624eef5b195b11f2e6ee012330e624834ff

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