Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcf3c0c7c65b932…

MALICIOUS

PDF

70.5 KB Created: 2021-02-22 15:20:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6bc8776b83ecf35203f2bf4ac05da9f0 SHA-1: 428240f34b3cf123081ce03b3c7f35026f2b6099 SHA-256: 1fcf3c0c7c65b932daad6e7df0713b9f56700db5b80b3c30f1e2499c181258cf
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=what+is+a+predicate+pronoun+as+a+subject+complement In PDF document text
    • https://static.s123-cdn-static.com/uploads/4459916/normal_5fef04e9717a2.pdfIn PDF document text
    • https://cdn.sqhk.co/guwuweri/Eydicgh/wumibumitabaz.pdfIn PDF document text
    • https://cdn.sqhk.co/zuvifilezaja/jdWqidA/fold_up_desk_wall_mount.pdfIn PDF document text
    • http://zinuxuf.22web.org/use_usb_wifi_adapter_on_android_box.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_600a921b65d4b.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/hfhgz5t/nostalgia_nes_emulator_android_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410414/normal_6019dee0789fd.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/fhf6jde/drag_and_drop_website_builder_software_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixevafuzija.epizy.com/34465413322.pdfIn PDF document text
    • http://pupajuxefelere.rf.gd/jedereketulodipupewuzepol.pdfIn PDF document text
    • http://xupebina.epizy.com/xidodoxufo.pdfIn PDF document text
    • http://gerireg.epizy.com/87786502149.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/aufgaben_performance_marketing_manager.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C7 3576 bytes
SHA-256: d242637fc596db3d7eb73cf8e0bd4ae7704a6fa33ed93dd31a95207b9668547f
font_01_sfnt_off0000d67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67D 5540 bytes
SHA-256: 20a75653a603b50e4fbf7b62d7b8b255c4ed1e502d67070a5cfd52de46ca714c
font_02_sfnt_off0000e932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE932 10320 bytes
SHA-256: 3bee0bc70b719fc477a2a2783d74a9bb855094968106b2f6d8538e5797f9735c