Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba4b9eeb881eb8bd…

MALICIOUS

PDF

38.5 KB Created: 2020-10-07 17:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f85965c80c21206eeeacd61f236a9c58 SHA-1: e5bca33d3ad08d6029a3427a208a9d0bc32075d8 SHA-256: ba4b9eeb881eb8bd01242c24a198c970423aed77e39f78b3edff6e727397fd19
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=formato+de+registro+de+inscripcion+preescolar In PDF document text
    • https://site-1036900.mozfiles.com/files/1036900/taluzo.pdfIn PDF document text
    • https://site-1036926.mozfiles.com/files/1036926/pebuganivi.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/xosinuxorab.pdfIn PDF document text
    • https://site-1036972.mozfiles.com/files/1036972/tunazozidomigubiwojajo.pdfIn PDF document text
    • http://files.brookejean.com/uploads/1/3/1/0/131070402/de58620a821c0.pdfIn PDF document text
    • http://rakekunak.gregschuchardphotography.com/uploads/1/3/1/3/131381910/wakitedumuloropunobe.pdfIn PDF document text
    • http://files.hoodoohealing.net/uploads/1/3/2/7/132740930/zugugavapiz.pdfIn PDF document text
    • http://files.martialhartamas.com/uploads/1/3/0/8/130814043/7603611.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/54322f1d-e720-4a56-a898-c1695a7c3563/70578505953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b57187c-8d05-4485-af02-51979bd5d326/4280165429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d53a12f-e42d-4ea6-bd51-2a89126a7aae/kalatefubibajixepinulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8383/4543/files/44527197128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7895/4389/files/44681540802.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_off0000532b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x532B 5348 bytes
SHA-256: c8abc52fd446d37ad8537aa86dceea9179d588ef11a99a603e38d23592b97639
font_01_sfnt_off00006546.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6546 11832 bytes
SHA-256: da04633699c289335963e1b54eed7687e02e11cc12501944242ed8f9c2fc5c33

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