Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b3335d2865f656…

MALICIOUS

PDF

41.1 KB Created: 2020-10-07 01:19:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 949025cae828f0a5984b41af6b4af1e3 SHA-1: f6fb4e706844559c1f052843412485987940c06d SHA-256: 57b3335d2865f656b1738d375f4dd144aba5d3462ab53bb6f87040d6edfeaf93
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://gettraff.ru/strik?keyword=adobe+scan+pdf+scanner+ocr+apk In PDF document text
    • http://files.coldharborroadcoc.org/uploads/1/3/1/8/131856626/3b9db54.pdfIn PDF document text
    • http://files.spmauzyandassociates.com/uploads/1/3/2/6/132682737/winazorizidasel.pdfIn PDF document text
    • http://files.gcrpc.org/uploads/1/3/0/7/130738882/f77805432958e.pdfIn PDF document text
    • http://files.mallahdivinemallah.com/uploads/1/3/1/4/131453950/finonuse_fawegoza_xexufojesotelo_pixupamadabo.pdfIn PDF document text
    • http://vupaxefed.legacyministries.info/uploads/1/3/1/4/131483245/7674.pdfIn PDF document text
    • https://site-1036711.mozfiles.com/files/1036711/23043430696.pdfIn PDF document text
    • https://site-1036779.mozfiles.com/files/1036779/20519172326.pdfIn PDF document text
    • https://site-1037240.mozfiles.com/files/1037240/36175451292.pdfIn PDF document text
    • https://site-1040687.mozfiles.com/files/1040687/nedanepuju.pdfIn PDF document text
    • https://site-1039278.mozfiles.com/files/1039278/77021098276.pdfIn PDF document text
    • https://site-1039539.mozfiles.com/files/1039539/digaluvabol.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5498 4968 bytes
SHA-256: a5dfed45e527330d29ef09468b0949622b4b658795db2c4600f0091566db1b63
font_01_sfnt_off00006570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 10656 bytes
SHA-256: 3bd4ddfee6a5582f7eae56d47eff64c767524bca28fae16d1f35e0879265e71d
font_02_sfnt_off000089a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89A3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2