Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8404d293f308e24…

MALICIOUS

PDF

34.9 KB Created: 2020-10-13 11:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 14f8f2ee5d22eea833d54531720e4c9a SHA-1: 6136795ff3da553936f980bac0172005fb2b93d9 SHA-256: d8404d293f308e24172a569c1072f439a3fa8c71c9b73704e16471b8101ba310
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://gettraff.ru/strik?keyword=agricultural+science+textbook+apk In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/9276785.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/pejajofedaxevaw_kozadesupuke.pdfIn PDF document text
    • https://site-1039279.mozfiles.com/files/1039279/42099326566.pdfIn PDF document text
    • https://site-1036938.mozfiles.com/files/1036938/88418731889.pdfIn PDF document text
    • https://site-1038779.mozfiles.com/files/1038779/20014605641.pdfIn PDF document text
    • https://site-1048186.mozfiles.com/files/1048186/84173975985.pdfIn PDF document text
    • https://site-1043134.mozfiles.com/files/1043134/lituwemitowefuvabe.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/987b21c6b.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/novovuxosijuzuz_wofabunutigepuw_dugulelura.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/004eb309-5023-48b2-a933-b6e24f97a0f2/jevox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a0f437c-57d3-4761-a133-9951e026ced7/60742443612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef4e037-b3eb-443a-bb86-873dc2c6d401/gajepofogedelomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9944bc22-3fbd-4899-98b9-53bda7b6df3c/pupajulebitarup.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_off000049e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49E4 5364 bytes
SHA-256: b59296242c4b9b26163db5b1086d8820572aca652b1c0739308e3e5b3edae4dd
font_01_sfnt_off00005c2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2F 10100 bytes
SHA-256: 4948efc7070f00d9c69842bbadbe102e8e5adaa1cf8a170884661b76967e3a9f