Malicious PDF — malware analysis report

Static analysis result for SHA-256 af580dbad00eeb3d…

MALICIOUS

PDF

43.0 KB Created: 2020-11-09 09:24:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 8ee9b85fbe48d9745019d1c08867798f SHA-1: 04ece6075df531cd377725c20766eafa8c3d1707 SHA-256: af580dbad00eeb3de5437d1318bcd6519478813877a1931a8eac2222b749c0fa
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=moguri+mod+ff9 In PDF document text
    • https://gusumadanu.weebly.com/uploads/1/3/2/6/132695601/pasex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417980/normal_5fa1fbe4f402b.pdfIn PDF document text
    • https://tevumusavobe.weebly.com/uploads/1/3/4/1/134108657/cff1c359b8cb2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://vumasut.files.wordpress.com/2020/11/l4_16_sharp.pdfIn PDF document text
    • https://gelolote.files.wordpress.com/2020/11/80264732904.pdfIn PDF document text
    • https://tewifozisoj.files.wordpress.com/2020/11/kewejen.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://dutekosakiwe.files.wordpress.com/2020/11/licenciado_cortillo_familia_peluche.pdfIn PDF document text
    • https://pazeden.files.wordpress.com/2020/11/86767518253.pdfIn PDF document text
    • https://janejujumi.files.wordpress.com/2020/11/74056702084.pdfIn PDF document text
    • https://radusawis.files.wordpress.com/2020/11/towezojiguvujibatuxumotiv.pdfIn PDF document text
    • https://depobudad.files.wordpress.com/2020/11/rs_means_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d069daad-84bb-450b-a234-c7e876437f63/nettoyage_d_une_chambre_en_milieu_hospitalier.pdfIn PDF document text
    • https://buwuxutujejo943710116.files.wordpress.com/2020/11/schlumberger_well_log_interpretation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de8e0ba-971e-4f40-acc0-c47fe8a1c23f/mi_propio_auto_in_english.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_off00005ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ADE 4968 bytes
SHA-256: d1c97e59a8dbc7a4798d479bfef27fbd7f38ed24e90af9023b40a551a83a6f4f
font_01_sfnt_off00006bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC2 16832 bytes
SHA-256: 3c43b87aa3b0351f2c139cc9ecff9783d31d8b9859f42d674d39fd2604535c44

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