Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8367937c4adcfc8…

MALICIOUS

PDF

43.8 KB Created: 2020-10-16 00:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 46cbe37f8e62ea1753e2775eea83a248 SHA-1: 270bf45aafa314c2e261be4a6321e83d3dfe62d2 SHA-256: d8367937c4adcfc8780e694dd7a90e79b75c807e51461d488f181504158dd1b8
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/123?keyword=instructional+design+in+educational+psychology In PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/6299623.pdfIn PDF document text
    • https://legadiduzavof.weebly.com/uploads/1/3/2/6/132681829/6769752.pdfIn PDF document text
    • https://dapujevubo.weebly.com/uploads/1/3/1/4/131438680/b25b27.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/1014041.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366401/normal_5f8732aada519.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5f877598b3fda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f871327b0756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369802/normal_5f88b905845a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_5f88868b3737b.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/1700446.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/rarosaj_lemepagega.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/7266703.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/613a711ec7ef.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/e73d6a239.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/1515306.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/59114125-b162-4623-aab6-f255b6f9f92e/97759205461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83331596-1f50-4f31-b9ed-4310d5a53d3f/38539056692.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60e8abb1-3ddc-41a0-aab0-7de491926e63/20596537006.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6808f9a-9ffa-4de7-b0d8-527dc71e0dfe/xesuvar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b42bb391-2ab6-4d8c-a2ae-52a2035ac070/tuxegu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7189/6741/files/nozuxukebugexapajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5198/2233/files/vogepulelijusopoto.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_off00006d74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D74 5376 bytes
SHA-256: 91d0d7e20165a3d21fb3055062c3dabf42b3eaa5d74feebf38f1688841573ab4
font_01_sfnt_off00007fb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB0 10008 bytes
SHA-256: ad29f840c27ea29b0ef2526aa1a23f831aa8c2e2f2f1f4a12cf218e40aea0837

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