Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f43dcbd580eb03…

MALICIOUS

PDF

52.8 KB Created: 2020-10-28 12:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d34fccb69319e267e51ea93c3f686c5f SHA-1: 16dedc945920927f03323a8564d5d1d4b5f7d541 SHA-256: 85f43dcbd580eb03ee5dc47570bd16dbc7c12f68c582f863d238e05b6be38957
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=taub+house+md+wiki In PDF document text
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/pivegegov.pdfIn PDF document text
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/7836599.pdfIn PDF document text
    • https://lipowuripipu.weebly.com/uploads/1/3/1/3/131378852/1140105.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/9681277.pdfIn PDF document text
    • https://leruzifu.weebly.com/uploads/1/3/2/3/132302941/0700d8519.pdfIn PDF document text
    • https://xuzojawuwakobo.weebly.com/uploads/1/3/4/3/134312069/notodesugatob_zerusefixetit_jetesatotelafa_wevere.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/peguvadapi.pdfIn PDF document text
    • https://sasakafu.weebly.com/uploads/1/3/4/3/134371045/vuzazeriruwuxiw.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/14f4aff3-959f-4a02-b23f-5bda89e2b9cb/padogadatusejez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/0825/6923/files/air_compressor_explosion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb927ecd-616e-4c3f-8968-058897b7f0dd/zobuvinaxoxelelesamavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cc23662-4014-44c2-975e-6be8265fa54e/queen_malayalam_full_movie_download_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0491/7306/9990/files/no_david_no_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2159/6334/files/91463369148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebcf7bdc-baa1-4825-991e-8ad66aef4a5a/duduko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00bb8666-49bc-4f08-8016-91132f2a498d/anexo_leiruk_el_chacal_disco_complet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb57550b-5438-4192-93dd-d08619ef99fd/xevav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0926/1220/files/what_did_t_rex_taste_like_folder_4_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0634/0515/files/2020_cadillac_cts-v_manual_transmission_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65680613-ecae-4463-a513-96d78f0a646b/punogurexus.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_off00008fcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FCF 5184 bytes
SHA-256: 9fd47e8320a0604b19f2c2098f90a5b71274ed02a5f0608ac4549f453374d1b4
font_01_sfnt_off0000a159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA159 10984 bytes
SHA-256: 65150a68e7b533027aca52e1d37ddcb1a87cc92258871e51f45c39ccb8688807

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