Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba9d7f1b79c5df8f…

MALICIOUS

PDF

39.9 KB Created: 2020-10-10 11:06:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: cfe7d313a848e749df7736d65336b2b8 SHA-1: 9c53981792aa37a5dbbeb64574542a0ef60203fe SHA-256: ba9d7f1b79c5df8fa239e9e7f24c4e16f4a80b41a90b5d4b76025011698fdf9b
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=unblocked+games+e+z In PDF document text
    • https://site-1040561.mozfiles.com/files/1040561/vixeduvareben.pdfIn PDF document text
    • https://site-1038478.mozfiles.com/files/1038478/towiwadomerup.pdfIn PDF document text
    • http://files.cheeselouisefoods.com/uploads/1/3/1/6/131606890/906f263f3.pdfIn PDF document text
    • http://fokugu.elliehutchison.com/uploads/1/3/0/7/130775506/4424514.pdfIn PDF document text
    • http://files.santaneraliving.com/uploads/1/3/1/4/131483372/8762a.pdfIn PDF document text
    • http://jamusa.sweetgenesis.com/uploads/1/3/0/7/130739860/492129.pdfIn PDF document text
    • http://sexoda.rowancountychristmas.org/uploads/1/3/1/3/131382133/vakax.pdfIn PDF document text
    • https://site-1036655.mozfiles.com/files/1036655/risivedopesogulita.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/19091631370.pdfIn PDF document text
    • https://site-1039494.mozfiles.com/files/1039494/56572164142.pdfIn PDF document text
    • https://site-1038635.mozfiles.com/files/1038635/lopawomobexuzaburadoka.pdfIn PDF document text
    • https://site-1042346.mozfiles.com/files/1042346/1928893043.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/ef8c493c-e246-4251-999e-6e561e76a2ce/kegakuwixilikovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ece4034-52f5-4442-a893-beeae573962a/69076835701.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e3f08d-3374-4093-9fe9-bc4586972465/42164575623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bed8a521-8a4a-4132-9061-efb259666ca0/42406643193.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a934c354-0227-411d-bccc-d595d6bfb7ea/64348272698.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_off00005efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EFB 5408 bytes
SHA-256: a77a34e2c2b6a0f762a3bd4ccea4b7317b77251fbac586b5aad161770616f579
font_01_sfnt_off0000715a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x715A 9824 bytes
SHA-256: 93eb2ab66bc7ee7ac9a1412191c90aa1822283c4bdca05cc856c19e1fe7ddf55

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