Malicious PDF — malware analysis report

Static analysis result for SHA-256 a357ed668453e947…

MALICIOUS

PDF

63.3 KB Created: 2020-09-30 11:51:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: ee8daa7e25e9705373e3686357558fc3 SHA-1: 92e22146aa870744fa5f0a428e4b7c816d5c0912 SHA-256: a357ed668453e947df839bedc80369e5c3332abe1463ed83ded78102cda76154
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://ggtraff.ru/strik?keyword=simple+biodata+format+pdf+for+marriage In PDF document text
    • http://files.theorionfoundation.org/uploads/1/3/0/7/130739238/6275107.pdfIn PDF document text
    • http://files.laurenkorshakmft.com/uploads/1/3/1/3/131380651/kodadu.pdfIn PDF document text
    • http://gonab.derksenlab.org/uploads/1/3/1/3/131381088/xaluxijefevo_gikozufovaduzej_wopivotekiv_lavupatik.pdfIn PDF document text
    • http://files.jangrunow.com/uploads/1/3/1/3/131383358/kowekukoxenil-pomupesafibiki-sudusagalimi.pdfIn PDF document text
    • http://files.shockentertainmentinc.com/uploads/1/3/0/7/130740456/roxivigevewos_regozasi.pdfIn PDF document text
    • http://files.pvawrites.org/uploads/1/3/1/4/131406977/tonixo.pdfIn PDF document text
    • http://rinutetu.davesbackyardbees.com/uploads/1/3/1/0/131070847/wafokaviripun.pdfIn PDF document text
    • http://torefibef.richlandcountytransit.com/uploads/1/3/1/3/131379846/80d7b.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/42d61f99-52a5-4381-8a3b-d1866e901973/dadadevexomemopovup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5320557-3149-4a11-9f23-2fca54a767e5/17770748228.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f10c7d7f-0769-4386-816d-bc293acb086c/6050976859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddcc1228-93f3-4577-895a-fa95df53f646/vuwusoxufididubovarone.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_off0000bb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB37 5424 bytes
SHA-256: f87779e1897ea4c48955e7c477edbe9586750134e79608e9bed79fc1bbf44857
font_01_sfnt_off0000cd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8F 10120 bytes
SHA-256: fdee417348fe2f54fa767950f19ea0c7827fff9c51ca89dc76adab537c9ec37a