Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcd0690a9eb4833f…

MALICIOUS

PDF

45.6 KB Created: 2020-10-19 10:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 49c4878c1f286e06e8f0e0d80178cb10 SHA-1: c23a8ae00736b75e0acc509e72f3418f94207c6e SHA-256: bcd0690a9eb4833f687d177f769954db0ca1d672b8c108a9202a678255aaeaa5
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://cctraff.ru/strik?keyword=convert+catia+to+solidworks In PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/7cb7941b450ab.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/5200784.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_5f8ce24e79318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f886198bda68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_5f891f1975077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_5f89624a3052a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368971/normal_5f88d1fab11c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_5f86f5b0024d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366325/normal_5f875a432a828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f87b3422dad1.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/8064750.pdfIn PDF document text
    • https://pojutawetuje.weebly.com/uploads/1/3/1/3/131382470/6701a34.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/5829622.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/buwafudo.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/rimemid_zepivetuwowim_kirarikuze.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/seposimitosu-dopuvak-jazerawafojowe-mesabuma.pdfIn PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/e9aad347d904.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/4045/1993/files/97833182825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7990/8504/files/pixofujuriweji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6444/8955/files/header_linked_list_in_data_structure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7337/9735/files/5916601983.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/2064/6048/files/yocan_evolve_2.0_manual.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_off00006a50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A50 5056 bytes
SHA-256: 3cfd4b31429bed5b5e399b95b1c48ac2c9d5fbf10df57b2882c51157ba0c87a9
font_01_sfnt_off00007b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9D 14712 bytes
SHA-256: bb8d163b9c2acfbcb237bffc8c9f65fcdaba98182abefa12f4fbd800a78efe37

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