Malicious PDF — malware analysis report

Static analysis result for SHA-256 80016c2bf62b2f4a…

MALICIOUS

PDF

39.9 KB Created: 2020-11-08 05:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: dbbf001db1201e04131ba66f069f7614 SHA-1: 4242006750962f7162e6e8a5c14f7123041df9d6 SHA-256: 80016c2bf62b2f4aafa7e30c0932a8b9c9c7daa20652c920be35360262cbdfe8
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://traffking.ru/aws?keyword=cotorra+puertorriquena+caracteristicas In PDF document text
    • https://wakolixib.weebly.com/uploads/1/3/4/7/134706528/2409328.pdfIn PDF document text
    • https://ramipataxeki.weebly.com/uploads/1/3/4/4/134483057/5645586.pdfIn PDF document text
    • https://terarawuterojuz.weebly.com/uploads/1/3/0/7/130739827/duxakinisa_najalub.pdfIn PDF document text
    • https://dokakida.weebly.com/uploads/1/3/1/3/131380589/7460340.pdfIn PDF document text
    • https://raralulewuk.weebly.com/uploads/1/3/4/4/134478892/risewabejivo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://piwutimi.files.wordpress.com/2020/11/50367575968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b611c33b-5e67-4d8d-a2f4-864ae313565b/teoria_autoctona_del_poblamiento_de_america.pdfIn PDF document text
    • https://papunovab.files.wordpress.com/2020/11/aprendizaje_cooperativo_definicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78638bce-5827-4959-a13c-e98341d0af14/excretory_system_diseases.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/rivizuvanet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9640d3ea-a489-4dca-b32f-bd1c7cf70e09/6799936474.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_off00005c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C6E 4924 bytes
SHA-256: 88309e6e4f4d84b48a67414a3ee8c8a7105b346cc18933e11fde3339e1e13335
font_01_sfnt_off00006d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D39 10624 bytes
SHA-256: 26d33c01fcc7d315ede60237e242d2c100fe89aed07998dc34e9f480c1a22e06