Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8f777d081fafe3…

MALICIOUS

PDF

71.5 KB Created: 2021-03-04 17:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e3fc8f4f2b9902d3b99520ac8db4d22d SHA-1: ee8b1c3003f61bb13e02abe3ba9e100cb84460c8 SHA-256: cd8f777d081fafe32a0c9071c5b207ed44896b94f86c835b73f3215cc777c94a
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/award?keyword=cummins+n14+celect+plus+ecm+wiring+diagram In PDF document text
    • http://morj.space/production_technology_of_cashew_nutsk3f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470533/normal_5fd6e401c3b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500665/normal_601ee43f83119.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426062/normal_5fdfddc9cfe92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_5fe6d434df5ae.pdfIn PDF document text
    • https://xozavefo.weebly.com/uploads/1/3/4/0/134018900/1168066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417029/normal_601ee7184a9f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_60379b3677193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495694/normal_60233e1844283.pdfIn PDF document text
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/zolotubu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468843/normal_5fe8f81827d87.pdfIn PDF document text
    • http://ita-bio.space/41538970084sqj7v.pdfIn PDF document text
    • https://diruwogedow.weebly.com/uploads/1/3/1/3/131382439/mogofa-nojumefi-wajus-mamubof.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3861ffd3-1717-4340-a986-488d3e033d3d/jagiwudeziwadopijodixog.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/dubobopubuwuxaxo.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/buyer_decision_process.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/56545988009.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a980619-2427-432e-9727-3bf714635f29/75076547065.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7504573f-a878-40c9-915e-92f5267551ba/xbox_one_controller_pc_driver_windows_10_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/edny_court_reporter.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/hess_s_law_exam_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03fc2926-429a-471a-93d5-e2e19ea8b85e/warhammer_end_times_vermintide_2_trainer.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_off0000dbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC7 5528 bytes
SHA-256: 881ee115bbd8abc220efd0af0c825924bd4f106a33bce145665abec67093c60a
font_01_sfnt_off0000ee97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE97 9892 bytes
SHA-256: 19f09d1dbe5feeb41397ca1999afc382244a5ff130e395a6ac9007276afbd445