Malicious PDF — malware analysis report

Static analysis result for SHA-256 a568c6f18c49e9f0…

MALICIOUS

PDF

37.5 KB Created: 2020-10-10 10:06:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 534461b5738feaeb506d0cf4caca31ae SHA-1: 747ab78eccb49122dc3c1adbb28bf9b581851a24 SHA-256: a568c6f18c49e9f0ac146dcce14b4162e9c543dfcc4d6f2499daf3d673c04f6d
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=throne+of+eldraine+promo+price+list In PDF document text
    • http://files.microcarandscooterclub.org/uploads/1/3/1/1/131163667/rijem_rofefa_bizil.pdfIn PDF document text
    • http://lexabunal.eakarts.com/uploads/1/3/2/7/132740405/gekufod-kupibanoxa.pdfIn PDF document text
    • http://files.estc.org.uk/uploads/1/3/1/3/131397934/6448549.pdfIn PDF document text
    • http://vezab.stjohnlutherans.org/uploads/1/3/1/4/131413418/pitibu_bamof.pdfIn PDF document text
    • https://site-1036960.mozfiles.com/files/1036960/8224921112.pdfIn PDF document text
    • https://site-1036675.mozfiles.com/files/1036675/51869105121.pdfIn PDF document text
    • https://site-1038669.mozfiles.com/files/1038669/loguvovarukiwebokad.pdfIn PDF document text
    • https://site-1042025.mozfiles.com/files/1042025/jofokebekulirewubese.pdfIn PDF document text
    • https://site-1036719.mozfiles.com/files/1036719/49266771086.pdfIn PDF document text
    • https://site-1043536.mozfiles.com/files/1043536/98919498404.pdfIn PDF document text
    • https://site-1042354.mozfiles.com/files/1042354/biwosuvedirafob.pdfIn PDF document text
    • https://site-1044184.mozfiles.com/files/1044184/wikelodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000053a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53A4 5344 bytes
SHA-256: bed4d253e28c4df536dd680ef496b6132b0c856ddd8b64e6d3aab7d9550d0184
font_01_sfnt_off000065a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A6 10524 bytes
SHA-256: d52d7dbac35558777ecfb55ea95a49fd6956c8e5b395b12db84d8e82bc1ff9e9