Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f0165761aeb7937…

MALICIOUS

PDF

43.2 KB Created: 2020-10-04 11:53:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 215ada96dff45b96ffc77168edec9c66 SHA-1: 64c05f6835a475807718955323148e6e6941ab59 SHA-256: 4f0165761aeb7937830bf30b58cca16985d76684c70cfa6e005cbe2f8ca0d162
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=quidditch+through+the+ages+pdf+in+hindi In PDF document text
    • https://site-1039583.mozfiles.com/files/1039583/66535203186.pdfIn PDF document text
    • https://site-1037037.mozfiles.com/files/1037037/tulemugavusodoviwaler.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/bebewovefi.pdfIn PDF document text
    • https://site-1038981.mozfiles.com/files/1038981/28279815417.pdfIn PDF document text
    • https://site-1037907.mozfiles.com/files/1037907/93602452945.pdfIn PDF document text
    • http://padurotut.incubator143.org/uploads/1/3/1/3/131379394/4068087.pdfIn PDF document text
    • http://bavasu.totsandco.org/uploads/1/3/0/7/130776089/zuwir-gilatewil-sisas-fajid.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/baed41ed-2ee8-440a-a4e6-12aa1c7402f7/tifupebuxet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9f57269-a127-4e5e-82bb-18ec2272b183/zipibifamopewumogiwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/890f7448-4498-45a4-902a-49ed8835cb1a/34666335653.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa9bea7-2ff0-4a23-b0f5-84766a40f402/61646855625.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7922ddc0-7a45-4ed5-9e74-5c841f601582/20127058792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc18678-7dc2-4c51-9b6e-f7e9eae98e38/kupazomefoder.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6db0520-ac79-4d3e-95d1-8ce085804d3f/80740332246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c02f478f-9db0-41bc-9735-393637b3a503/71864631917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21572442-484d-402c-b43b-c48c486df924/jezabizozirokuwazegemib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcd97188-200d-410e-827f-8f63b08c22bb/22587063592.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_off0000693b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x693B 5444 bytes
SHA-256: 6eb9e65a31c11b39e47c743627be948848ec04dd63ec6ec7fc83e193b0e52cc9
font_01_sfnt_off00007bbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBB 10516 bytes
SHA-256: 146b3a901dcc2122ade4b285a8de9fd360fdb438f731867972571dae6fdf41b2

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