Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e1d33c8598724f2…

MALICIOUS

PDF

42.7 KB Created: 2020-10-03 03:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1cc1ece9eb8d23d9580e3636562f1a2d SHA-1: b72ef6e5a47a8041879224a6d155f7246af06f92 SHA-256: 7e1d33c8598724f28a29e0ebbbc3363b272c2140cc5860a66f2f0ea984bd69e1
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://ggtraff.ru/strik?keyword=english+in+use+burlington+3+eso+solu In PDF document text
    • https://site-1039897.mozfiles.com/files/1039897/fofoduxiverejo.pdfIn PDF document text
    • https://site-1036625.mozfiles.com/files/1036625/12456021479.pdfIn PDF document text
    • https://site-1037018.mozfiles.com/files/1037018/manaw.pdfIn PDF document text
    • http://zudinigaf.allietheafghan.com/uploads/1/3/1/6/131606923/9718340.pdfIn PDF document text
    • http://files.sapersportsmed.com/uploads/1/3/0/8/130874148/655f2d620f70ef6.pdfIn PDF document text
    • http://wonunel.thepilatesgathering.com/uploads/1/3/1/0/131070374/40d2b0e3dc8a29.pdfIn PDF document text
    • http://files.geoalpha.org/uploads/1/3/1/4/131408942/xinakeli.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
    • https://uploads.strikinglycdn.com/files/de0118f8-0612-4623-a230-d93c10fd57f0/17528657985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/774a08a5-e6d8-47d7-854e-daa6b24d4dcc/temadab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa7259f4-f940-4c10-9b10-5ff45872df3e/jelevojebalamolofubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1fb5a6c-fd82-46f3-a0aa-2cd1fe73b59c/dopotoduti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b1d3932-eb68-4f37-8c90-ffc026c8d137/bigipa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cef1e009-6663-4f8c-82ad-9088c3b2e2d1/10793319139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfb08af5-8c8c-442e-ac93-66a358a987f8/61249508217.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c80308a7-a7b8-4a94-acee-8915e7851bcb/95775311649.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/431315c9-5d78-41a0-bdc4-c6e4c58224dd/42504611152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b245dc43-f975-42c1-b56a-4c6b19420618/89850018810.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D38 4880 bytes
SHA-256: ff7cd7522d7809d1b91f52cc390f88ffbbc18e2d4e3b345f4bb3891de9b8cbfd
font_01_sfnt_off00006dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC7 9740 bytes
SHA-256: 2f6c5db7f812a060da8a1bd90c0747d20153f191ccc1a010eff9bf5d4debc54d
font_02_sfnt_off00008f19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F19 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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