Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfe7362d4b70b15…

MALICIOUS

PDF

72.0 KB Created: 2021-03-05 14:47:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2a93901e99b6e899936cdc6eb2a06e1b SHA-1: 3a33503051cae12d094e2f3cefc75e414abb4abd SHA-256: cdfe7362d4b70b152e0c4da0c297ad4decaf71b7634d6276e3dc6207cd276a43
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://yafferge.ru/award?keyword=too+big+to+fail+trailer+subtitulado In PDF document text
    • http://nakozek.mypressonline.com/80809557880.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/pizuwukejare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387417/normal_6001e31a0ca35.pdfIn PDF document text
    • http://airned.ru/how_to_estimate_the_cost_to_build_a_housee9gk8.pdfIn PDF document text
    • http://sarkife.site/88386321948ym71q.pdfIn PDF document text
    • http://nibewubixela.getenjoyment.net/31977145789.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417128/normal_600f03e5125af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367903/normal_601241b2ed18b.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/lenub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368760/normal_60079a9bc07e2.pdfIn PDF document text
    • http://chtotakoevuxom.biz/gitobekanumofexagebl1jz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454971/normal_5fcce24301b3b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bexukavibume.myartsonline.com/what_happens_to_a_car_when_the_catalytic_converter_is_removed.pdfIn PDF document text
    • http://fidalanono.myartsonline.com/what_are_the_common_citation_styles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64056e35-fb07-4c35-b176-3518b6960a06/86616301729.pdfIn PDF document text
    • http://sajatuvireguta.atwebpages.com/sentence_structures_worksheets.pdfIn PDF document text
    • http://wififeju.atwebpages.com/diccionario_biblico_adventista_gratis.pdfIn PDF document text
    • http://zikoliduxa.atwebpages.com/xamabopopesowebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b48bc508-aa9a-4a37-ab16-4facce200744/zekusikafedunifagolire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdc0310c-0806-4f74-b971-dcc61afb846f/94292919384.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c61c8e-cac9-476a-8b5a-e160763b8746/lorogageravubu.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_off0000de67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE67 5164 bytes
SHA-256: 05801ca814f02e8396a1fa2ef0201afcc7150d03720b1fa4b6534a28e8d5f288
font_01_sfnt_off0000f006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF006 10124 bytes
SHA-256: a44a6e458184b270bace0add374175bfad7061c40b6e2e6fa8dfeab95ad444f0