Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6e0f39cfe0e861…

MALICIOUS

PDF

39.6 KB Created: 2020-10-01 06:47:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c2c8b55cbe30fceb74239d43b4ec8fbd SHA-1: 38e704a546c67163e203f325db66569447d94d8c SHA-256: 9a6e0f39cfe0e8615577c2733ada97aa6b0643964996da9bb237c75fafa9e0da
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ggtraff.ru/strik?keyword=oxford+arabic+to+english+dictionary+pdf In PDF document text
    • https://site-1036731.mozfiles.com/files/1036731/64194977050.pdfIn PDF document text
    • https://site-1036851.mozfiles.com/files/1036851/vuwudafemojefuvav.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/larefedonizozagukigugut.pdfIn PDF document text
    • https://site-1037069.mozfiles.com/files/1037069/sesefixagisuxixora.pdfIn PDF document text
    • https://site-1037081.mozfiles.com/files/1037081/devuzarufalodukixu.pdfIn PDF document text
    • http://kabak.chrisball-student.com/uploads/1/3/1/0/131070894/1672640.pdfIn PDF document text
    • http://files.chqchurches.net/uploads/1/3/1/4/131407226/xawopumupenat.pdfIn PDF document text
    • http://files.gmmartinbooks.com/uploads/1/3/1/3/131379325/wefimejoju.pdfIn PDF document text
    • https://site-1039813.mozfiles.com/files/1039813/besozalunomitewif.pdfIn PDF document text
    • https://site-1036834.mozfiles.com/files/1036834/jegekikivajowetorufa.pdfIn PDF document text
    • https://site-1036800.mozfiles.com/files/1036800/banebitufemasipetateviv.pdfIn PDF document text
    • https://site-1038531.mozfiles.com/files/1038531/76628239210.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/b5fb8933-b89e-4069-af67-f6909b9951a7/zejife.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/986edd47-4fb9-42b3-908a-afa4430bcf51/luwalumaxipaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6747415-d13a-4148-a8de-2e6660aba06d/lolamorejamokaxepiwufujob.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_off00005a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A4D 5752 bytes
SHA-256: 28ac65d7df73a0dd5553927558b04d4e10a8b2e86d960171a46c19e7008a7bad
font_01_sfnt_off00006ddf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDF 10448 bytes
SHA-256: 28cf1508371669ed3f3aadfea929830b1936a0a77f4e74f32a5753c7a5b29163