Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8bff8c075aa106…

MALICIOUS

PDF

71.3 KB Created: 2021-03-12 10:28:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c762027b24ccc6de5fd9350a1d26ca07 SHA-1: 60ed00f44154ab6e29f9a2e3b9fba182e2b1eea7 SHA-256: 4d8bff8c075aa1064c72f0e0952fafc2ed59ee25a159b0cbb673b8ad2dc478fa
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=give+me+liberty+eric+foner+pdf In PDF document text
    • http://rineset.xyz/bujiztn56q.pdfIn PDF document text
    • https://gepadagonuvo.weebly.com/uploads/1/3/0/7/130775626/jukojemuwux.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/edb736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407793/normal_6049595a02dce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496826/normal_603f19b5531be.pdfIn PDF document text
    • http://gavediteriremuv.medianewsonline.com/sin_noticias_de_gurb_in_english.pdfIn PDF document text
    • http://leqqurint.online/grand_auto_theft_game_freeg8bo8.pdfIn PDF document text
    • http://centerverifybadge.com/83682948747al6qc.pdfIn PDF document text
    • http://vaxiliwu.medianewsonline.com/how_to_make_a_table_with_metal_legs.pdfIn PDF document text
    • https://zoxamadafipezo.weebly.com/uploads/1/3/1/1/131164297/bozupixotixuwod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415061/normal_5fec309791a1b.pdfIn PDF document text
    • https://wafanipo.weebly.com/uploads/1/3/2/6/132695839/f8fcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492901/normal_5fe0291169434.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_4377672f472f4303a83f81b7cb9e268a.pdf?index=trueIn PDF document text
    • https://f3dbd103-cf2f-44fc-b0ad-c9004dc38af2.filesusr.com/ugd/1f2646_a16a677805f447648c4935d221ec280c.pdf?index=trueIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/gufewanuvepuvofolevuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4520b64f-911a-4653-a2a7-5c3b4f963b31/viropuruforideg.pdfIn PDF document text
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_a826c10e7cbe4523afd1c5caf5bb8b8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f79fc7-352c-4d5a-a790-27e8ce3d855c/how_to_change_panasonic_answering_machine.pdfIn PDF document text
    • https://a0d2adcf-75bd-42a9-a42a-c23e1c6e9e1a.filesusr.com/ugd/85c99c_44104322c2b04c6b868a89011b43cabc.pdf?index=trueIn PDF document text
    • https://d4f1f58f-bd44-402a-a4b0-a3aa01e36dbf.filesusr.com/ugd/dffefa_c4f0b4eed3bd4c91b88eadc38a6e3c61.pdf?index=trueIn 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_off0000d73f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD73F 5248 bytes
SHA-256: 0427997e8b2f84f7ff3dba198fbd981420a9eb6278b827e0e8d0dcad2bdf4dbe
font_01_sfnt_off0000e917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE917 10780 bytes
SHA-256: 597cb6746cea7d35995a28d2bafc26a0d8b62b6cbecac1149879f5a891614193

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