Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f0e3ac11f7725a1…

MALICIOUS

PDF

53.3 KB Created: 2020-10-17 02:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1b6e9fce4a95751febe2ea021b40ba41 SHA-1: be4c87a1155a9efcdab93e14226518d9ff343ce6 SHA-256: 3f0e3ac11f7725a13f6846d8336e5f12e1ddf7e8b0e6757641c45e4f9586f16b
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=liverpool+library+press+online In PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/pekukipuvi.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/sulifip_bimewu_wevobami_fivixibileso.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/lesalusabegofodoguj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_5f8a28b0630a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368770/normal_5f89520438481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373508/normal_5f8a198554522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f8714584ce91.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/jowagova-bevomirododuboj-gujinamoxasav.pdfIn PDF document text
    • https://jelamiwigu.weebly.com/uploads/1/3/1/3/131382248/zuxozit.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/00b58609-f2b3-4a29-a3f5-44c750c1626f/79823057447.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47951b6d-d32c-4c63-9cd8-05b4c656f2c6/tagifakegewulafutodele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/471ffb64-7afb-4cf9-b466-2da94b01c7b4/humorous_table_topics_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b52f20bf-037f-4780-8521-eac1259e8309/73162564902.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5538/0630/files/74923599111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9634/1157/files/lover_awakened_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c481f97-3041-46d0-98c8-596651aa7e66/gelukefobamirogofikapepur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eeb1914-96f7-4625-a47a-48857b287114/pavisipifulifobatinolezez.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_off000091c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91C1 5056 bytes
SHA-256: d641ef76cb177e87717c1cb632619385b865465cb2843caabd20bc13802ef96a
font_01_sfnt_off0000a303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA303 10940 bytes
SHA-256: 174af54d647cd057ddec853fcc43a347996aba80e86f8d9f63dffa1f45642919

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