Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb3a6cfe07d5a263…

MALICIOUS

PDF

44.1 KB Created: 2020-10-25 13:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: d1d6cc99a559b980e157eb8d291aea04 SHA-1: c64d1ce54d0fac6b846cd56e428feba26bb9c935 SHA-256: fb3a6cfe07d5a263d22d614c58d8bccbb4d394362ada504a29e24247fe04c893
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://ttraff.link/123?keyword=free+printable+calendar+october+2020+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385198/normal_5f8e74a22a691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f8764a20a2ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f89f4c84c2ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f8ccbe9ccc44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365624/normal_5f890ad566aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376599/normal_5f8a6eb9e5b77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5f91cea6d1663.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5f8fce3724c39.pdfIn PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/c280f.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/jasamatelez.pdfIn PDF document text
    • https://zegimobigew.weebly.com/uploads/1/3/4/3/134313375/rekavonu-risonuzilamaze-ziwivadolitak.pdfIn PDF document text
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/zudejoviri.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/8d6435d540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382421/normal_5f8b3c784d14f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f9201dcc99e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371272/normal_5f93068cb7640.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370057/normal_5f91081a92aa1.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006d12.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006d12.bin)
    • https://uploads.strikinglycdn.com/files/5db12c2a-baae-47f7-83af-86c37e3b464e/91559000457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/942439d4-f9ba-4126-bc8d-27314e02843b/biluja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28c99c42-ae4a-4fb0-b6b9-4d24810c1a85/3264350591.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ee0f2a-5d77-417c-8806-44d381150acd/58243556599.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedfb760-d85b-4e99-a78a-8ef526e5e9ec/mogifob.pdfIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/38656149802.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/xudovilidu.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/62144927039.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/40107155662.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 extracted file (font_00_sfnt_off00006d12.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D12 5340 bytes
SHA-256: 4e35d9f703fbf576fca5e047bbe398c2eb9015b320447eb337e91649e04a3c8b
font_01_sfnt_off00007f3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F3C 10552 bytes
SHA-256: 052b66d09fa09b99b6b8f58af517681c1d9448ce2aa369c1419f7889f831c5b8