Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d62eacb64db448…

MALICIOUS

PDF

72.7 KB Created: 2021-02-07 05:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bbcf7a4f8404a94909b675824de62c5b SHA-1: 8b248588f268b2d1da3988e54e0c0ed80302c628 SHA-256: d4d62eacb64db448501c614bef92e57ceaae677d40dbefa12979b36caa90cd76
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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/wb?keyword=bk%20coupons%20pdf%20april%202019 In PDF document text
    • https://static.s123-cdn-static.com/uploads/4471114/normal_5ff44015eaa72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409628/normal_5ffba6c91ebc2.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/aUHIjfy/59600047110.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455387/normal_5fe7cbfe80f80.pdfIn PDF document text
    • http://bonusiotsbera.online/73705115814z7awb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484814/normal_5fd9c86a6cf91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405179/normal_5fe40dbef0f46.pdfIn PDF document text
    • https://cdn.sqhk.co/nofoxanu/ibRR1Xt/kulalabukubeloxa.pdfIn PDF document text
    • https://cdn.sqhk.co/jisaside/jHshfhe/best_comic_book_reader_ipad_pro.pdfIn PDF document text
    • https://cdn.sqhk.co/firumefetev/Qgctwxh/accredited_homeschool_programs_in_michigan.pdfIn PDF document text
    • http://kegujusotuk.iblogger.org/ribifiko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://debukigezi.epizy.com/67609993803.pdfIn PDF document text
    • http://sawozepanoludib.rf.gd/73049131323.pdfIn PDF document text
    • http://jilevatawew.epizy.com/leica_ts06_plus_datasheet.pdfIn PDF document text
    • http://mezubivedoxida.epizy.com/addition_worksheets_free_printable.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_off0000dd21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD21 5744 bytes
SHA-256: e312439021196d9573db9590b22830359d44d4debe2efb02b39a70867cbbbd8c
font_01_sfnt_off0000f0c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C7 10944 bytes
SHA-256: 91eb186e5d011d49749ec0873882dca90b7067c42de85ec4ce08768aa01f0759