Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9cafee8a7dd4564…

MALICIOUS

PDF

44.3 KB Created: 2020-10-26 07:12:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: ee75db14b27dd0958946fa2b315185c3 SHA-1: 37ea0c545bb4b7dbfea388683c5bd26e406ec51d SHA-256: e9cafee8a7dd4564614431bbccf944bf713389ce998aede26b6ff1dd99fa0cb5
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/aws?keyword=business+information+systems+bocij+4th+edition+pdf In PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/1a27643b41869.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/1654521.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/5473886.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/sofaratig.pdfIn PDF document text
    • https://xujaxivef.weebly.com/uploads/1/3/1/4/131438557/8431065.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375907/normal_5f8d165216e0f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373261/normal_5f905406bbb2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f8e23d5b9a8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f9375eb49adb.pdfIn PDF document text
    • https://papunagaku.weebly.com/uploads/1/3/1/3/131384156/69287c9de2.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/dufurifezowa-tedozafojo-katowisasanuja-dakikipuku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a122a0df-825b-4477-a5c6-04e47d0988b9/92453740602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4fcb416-e7ee-4179-8fad-d83c89cde110/pusena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e287cc12-cece-4b06-89f1-aa5ee39a2e44/wowukaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4b2966d-9261-4436-9fde-ab1d0d89aca0/jejigufib.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/temporal_convolutional_networks.pdfIn PDF document text
    • https://s3.amazonaws.com/nowonovege/fogivarinuxafipopoganeta.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/printing_company_profile_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ed0aabf-01c2-420e-b253-c7fe3fd6303d/gokizogu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76cba26d-66ce-4dea-85ea-4f2b126d2259/15217754836.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D88 5700 bytes
SHA-256: 3fed2aa1f3412252cd64c459f24ad1246c9c8080b6f8359fc7f50f2892cdbc9f
font_01_sfnt_off000070c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C2 10284 bytes
SHA-256: 735ffd33139dcc44aa51f0090d2f7ddb65baa559bbb6371ac405add40a609218
font_02_sfnt_off0000931c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x931C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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