Malicious PDF — malware analysis report

Static analysis result for SHA-256 8845b3c55fdb50c0…

MALICIOUS

PDF

76.2 KB Created: 2021-02-28 00:33:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4a9940e638f5443aa17fe0c349f4e3e2 SHA-1: 34197544b0db83a496c5d61bb66ed0ed17803c78 SHA-256: 8845b3c55fdb50c0569f13e25c05ebb24de8ee546f6156ba090de2268fd5aa6b
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://golowaki.ru/wix?keyword=frozen+cakes+near+me PDF link annotation
    • https://femovoba.weebly.com/uploads/1/3/0/7/130775826/8035582.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380082/normal_5ff9e5bb87e99.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/wiBnOha/idling_car_law_california.pdfIn PDF document text
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/3489230.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/oiaZjhI/trishul_farm_master_tractor_price.pdfIn PDF document text
    • https://cdn.sqhk.co/neseleko/faWZDy4/51257423735.pdfIn PDF document text
    • http://wowitaly.space/kowosinhcsv5.pdfIn PDF document text
    • http://yourlivehelp.com/mejuneruzaripegod48g4t.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefaxeker/NIjdZhb/virtual_drum_set_pc_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kibutonap/hbjjhjG/feisty_synonym_and_antonym.pdfIn PDF document text
    • http://xapozibun.22web.org/eljezniki_kolodvor_zagreb_informacije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447487/normal_6010cdf2ea271.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471083/normal_6022920e97de4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tatefes.rf.gd/angularjs_form_submit_validation.pdfIn PDF document text
    • http://sujobej.epizy.com/95848253319.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_off0000eb16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB16 4980 bytes
SHA-256: 9c85265e8f6903baf512a07527fd858a5a0fe433473967e9492e12211d3756fa
font_01_sfnt_off0000fc01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC01 13368 bytes
SHA-256: 2b4b7f7ef14f7c8fac01b82d5030673f951e2545163a9b627aab7cf9c6d0cc1f