Malicious PDF — malware analysis report

Static analysis result for SHA-256 f579025de083aa5a…

MALICIOUS

PDF

71.6 KB Created: 2021-02-27 14:50:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9dbeb80944ba2ff1e0cdd667310f6ca5 SHA-1: 145cbac4796b8f3f454d79dd6c16374daf52ef7c SHA-256: f579025de083aa5ae20105e2b1b0d7c4d7b6668a266e6f13947247302c29bec6
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=massive+vst+crack+serial+number In PDF document text
    • http://particuliers-societegenerale.xyz/clarinet_christmas_sheet_musicj5io4.pdfIn PDF document text
    • http://adyga.site/nudoferovojoxujozejopsy81.pdfIn PDF document text
    • http://maska-respirator.shop/how_to_use_gevalia_coffee_machinebxukg.pdfIn PDF document text
    • https://cdn.sqhk.co/meduxemij/ijsieSh/clubhouse_invite_code.pdfIn PDF document text
    • http://vijexibat.mywebcommunity.org/harvard_best_cover_letters.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/hfjbzia/asana_yoga_definition.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/what_are_the_14_principles.pdfIn PDF document text
    • https://cdn.sqhk.co/devisojop/Siemgj6/cnc_machinist_school_in_florida.pdfIn PDF document text
    • https://cdn.sqhk.co/munoforifuso/7tujjYb/ledadunepu.pdfIn PDF document text
    • http://jsexj.fun/ascom_myco_3_datasheeti2s5t.pdfIn PDF document text
    • https://fokifukamanur.weebly.com/uploads/1/3/0/8/130874497/pujusikofujot-sasejoroziwe-kevusexilikuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vawirir.atwebpages.com/dell_optiplex_7010_mini_tower_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_off0000dca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA6 5212 bytes
SHA-256: f3dadbea44f4893a9535bed467ad1f2bd10a7d22e6a1e369cf09c4efd1e528b0
font_01_sfnt_off0000ee61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE61 10208 bytes
SHA-256: 4d3c39156f0ca232f5a3b94745fd1e320f15fe4e88e8ecf9e81ba75af37ae612