Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c903c9466d152f8…

MALICIOUS

PDF

45.9 KB Created: 2020-10-15 09:26:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2335a0c066619caad8288bee6848db8d SHA-1: a6badd6e2a170cea970963f2e91d2f00743f906a SHA-256: 8c903c9466d152f81b12de5a12aeaec696200e27a827e9205afdee8c68cf4725
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/pify?keyword=hiit+training+workout+pdf In PDF document text
    • https://biwugina.weebly.com/uploads/1/3/1/1/131163984/bogitasubitenawutaka.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/bosilo_ginasesif.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/f5d445.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zuvefusu_tewojawowebav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_5f87b0984f45f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366666/normal_5f87695799e6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f873d805b123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369150/normal_5f87e796a707b.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/9051060.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/d549da259ed0cb.pdfIn PDF document text
    • https://pukotegifo.weebly.com/uploads/1/3/0/8/130874060/givax-vagip.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/zoleduk_zazadopapolo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f87166eed270.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f8775c05240b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f87af30ae1cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_5f87ddfa2a9a8.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/1/0496/0383/8104/files/jatawujuxalepebefelop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9276/3039/files/45625934124.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0745/1041/files/31119752763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0191/3759/files/ravi_zacharias_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6097/1670/files/17269591563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1243/0230/files/outfield_positions_in_softball.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5007/2214/files/fixoxezolozela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2019/7281/files/vuwewatafe.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_off000075a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75A6 5116 bytes
SHA-256: 7ad6191cf10f262650804fe7e950a4c3e094e84ea5942656804baed8707fdd67
font_01_sfnt_off00008729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8729 10372 bytes
SHA-256: ba265c9ada2e4487fffe2f2a9b457ae9d5eb2344e4374622483630a86339cdc9

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