Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1eef8b9a5c75a2a…

MALICIOUS

PDF

41.7 KB Created: 2020-10-17 12:39:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0a672839fc260c6922edaf4e113f4e9a SHA-1: 20ed3e8d3d895dbaf902f1a32f7ce0e232ec1b4f SHA-256: c1eef8b9a5c75a2a2128b8ff5262e5e61e6492fe5802e95710edf205298d2e26
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=second+great+grand+uncle In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f8aa01a703bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f8859b388268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365591/normal_5f87de5224761.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f8a7d2d21c40.pdfIn PDF document text
    • https://mupibidegupek.weebly.com/uploads/1/3/0/8/130874042/wojokegiwumapo.pdfIn PDF document text
    • https://bibeliki.weebly.com/uploads/1/3/0/7/130738572/dulisizemeforativom.pdfIn PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/kazesafazoti.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/6119011.pdfIn PDF document text
    • https://wavuvavezexa.weebly.com/uploads/1/3/0/7/130775629/wodonunaxasim-segonotijamivu-nupuz.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/2543453.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/vepifetered-kerijax-wuxugunemadove-vevolavefodi.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/c9440356.pdfIn PDF document text
    • https://tunomofezu.weebly.com/uploads/1/3/2/3/132303147/b05e93079e8a3.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/ruvafegebipe.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/5574010.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/89e6683ee494.pdfIn PDF document text
    • https://zeginuvo.weebly.com/uploads/1/3/0/7/130775519/kobajazidewulu.pdfIn PDF document text
    • https://nikuwexipamojag.weebly.com/uploads/1/3/0/8/130813731/fadogifaletugudatasi.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/aba6767fe610.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/1836762.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f8a76261461f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f88c93c648e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367944/normal_5f8758df87450.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00005ee8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE8 5032 bytes
SHA-256: d99c0137787032f20f930aba47d2a87be170bae29ca43c1bbcddc36509ba4330
font_01_sfnt_off00007002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7002 13212 bytes
SHA-256: 9e3d8e611f4213096d1b6c6f70ffe6bc4127859bccf6d46bf95daa87af4f878f

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