Malicious PDF — malware analysis report

Static analysis result for SHA-256 9836f8d21b9c6626…

MALICIOUS

PDF

75.2 KB Created: 2021-02-22 22:58:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: dc21d2ec73b456380b04eb095dfda88c SHA-1: a61c03c4c7449bef5912895e6bd67e8b48edf726 SHA-256: 9836f8d21b9c6626e8e43464f6ba0563cf92377563a7e525a692659f1da34897
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=why+did+stock+market+crash+in+great+depression PDF link annotation
    • https://cdn.sqhk.co/fudamozomeb/oNdgh31/samsung_s9_secure_folder_gone.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gjaUzAR/komudorunoza.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/PgcUxij/facebook_lite_download_9apps_download_2017_free_download.pdfIn PDF document text
    • http://ruwegekugite.22web.org/35360265130.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/jahQjhn/domikawevezarifog.pdfIn PDF document text
    • https://cdn.sqhk.co/gunuzuli/Mbg3jeE/video_player_app_download_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/duzimisese/6VVp5gf/97325604466.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417037/normal_5fe7095feeec9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409813/normal_5ff712365bb84.pdfIn PDF document text
    • https://wixokaregojes.weebly.com/uploads/1/3/2/6/132681478/zusefirux.pdfIn PDF document text
    • http://fomilexavekol.22web.org/multiplication_coloring_worksheets_free_printable.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471250/normal_5ffe537551522.pdfIn PDF document text
    • https://radetotoko.weebly.com/uploads/1/3/4/6/134697609/52f30674647d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501775/normal_601ad8769fde6.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/Kgc2Lgi/retrograde_pyelogram_for_kidney_stones.pdfIn PDF document text
    • http://namunogetivij.iblogger.org/63357682980.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tuxijug.rf.gd/25953815666.pdfIn PDF document text
    • http://patesosiw.epizy.com/kebobisimigitenakozorojas.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_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 5632 bytes
SHA-256: 6c5c3ce9ccc3c634fb94474c33002e5cf4db7dd4108234f2d357dc280913c492
font_01_sfnt_off0000f948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF948 11340 bytes
SHA-256: 3e83e761f8b5f0c03040169bc5b286c4ff02a5b804da0aedb0ee0312731212cc

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