Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f2bb283bf3ba8f…

MALICIOUS

PDF

79.6 KB Created: 2021-03-31 12:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 78e27aab83df9f26764f22596bbf8730 SHA-1: 2177a41a170234b045ad2928eab3f4f14def3f1d SHA-256: 59f2bb283bf3ba8f203c69f527844f6c243b0675ef8cf2f1cdbd7d7f02a70624
244 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites, some of which are identified as malicious redirectors. The document's structure and embedded links suggest an attempt to distribute malware or lead users to phishing sites. The presence of multiple links on disposable hosting and the use of UTM parameters indicate a campaign-like distribution strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://yafferge.ru/strik?utm_term=royal+caribbean+deluxe+drinks+package+2020 In PDF document text
    • https://ronumotesagazuw.weebly.com/uploads/1/3/4/3/134373959/e6922e473.pdfIn PDF document text
    • http://eushopvmn.site/how_to_program_a_honeywell_pro_4000_thermostatqigi1.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/eSifheZ/95893272987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448113/normal_5fdc41d57e76e.pdfIn PDF document text
    • https://jabefebilinoke.weebly.com/uploads/1/3/0/7/130739415/soxewirotolinogawowu.pdfIn PDF document text
    • https://xisevulatunetu.weebly.com/uploads/1/3/4/5/134595014/tagexuj.pdfIn PDF document text
    • https://cdn.sqhk.co/badaxiloru/jwBgehb/snowfall_2020_return_date.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392215/normal_603b643248be6.pdfIn PDF document text
    • https://cdn.sqhk.co/mekurapiw/jhijKy6/sabadell_8_bits_retro_mini_games.pdfIn PDF document text
    • http://reduslimitalia-ufficiale.site/convert_to_jpg_adobe_reader_dcz4hf5.pdfIn PDF document text
    • https://dofidosuxemaxej.weebly.com/uploads/1/3/4/5/134595751/65a80c9.pdfIn PDF document text
    • https://cdn.sqhk.co/jasolizilaf/jfGIAR4/legacy_2_the_ancient_curse_walkthrough_part_2.pdfIn PDF document text
    • http://ylyn.ru/jazodipukoqk6dq.pdfIn PDF document text
    • https://cdn.sqhk.co/nusatabi/Fpifjar/bodesulujaxuxekajesew.pdfIn PDF document text
    • http://morj.space/21344316553os6gu.pdfIn PDF document text
    • https://cdn.sqhk.co/xivovido/idhJjff/cinemark_peru_san_miguel.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/286100.pdfIn PDF document text
    • https://pefoduzipim.weebly.com/uploads/1/3/4/3/134371740/3690637.pdfIn PDF document text
    • https://cdn.sqhk.co/mamidusidozu/VibHegf/nintendo_switch_online_family_plan_upgrade.pdfIn PDF document text
    • https://fonuwinozizanam.weebly.com/uploads/1/3/1/4/131408397/borotat-domonusitugo.pdfIn PDF document text
    • http://legko.travel/mepulafunirarukudhw.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/jh8icoO/24675733621.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/4VjhgMa/bkash_send_money_limit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61C 5896 bytes
SHA-256: c972a759b5d268edd4fb77868e219d59ca83c79fde2f42e666c8bab798cad2d0
font_01_sfnt_off00010a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A45 10928 bytes
SHA-256: 4e4a841aad83107c482250b14ce7b854942dce722a1886aca9ef8673673bcbf5