Malicious PDF — malware analysis report

Static analysis result for SHA-256 8588a85dbf4ed6cd…

MALICIOUS

PDF

43.8 KB Created: 2020-10-15 11:09:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5d15940e0d6e8f32e21362b1c30b97b3 SHA-1: 2db6f9e9620cff11eb7c170dc3172c49aa0e8c69 SHA-256: 8588a85dbf4ed6cde93110aa286a4eadcf4feb0bbd3e07ed30427f0ed29f8961
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://cctraff.ru/123?keyword=nighthawk+router+r7000+manual In PDF document text
    • https://site-1043855.mozfiles.com/files/1043855/danafigujukifozawubelebud.pdfIn PDF document text
    • https://site-1039897.mozfiles.com/files/1039897/figojigunofezejelorojopab.pdfIn PDF document text
    • https://site-1041614.mozfiles.com/files/1041614/17476647087.pdfIn PDF document text
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/madimepeje_kapipujijevawob_jogaparev.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/9400458.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/bamudepekepa_setumazowido.pdfIn PDF document text
    • https://kupugaxome.weebly.com/uploads/1/3/0/9/130969415/babesipaxuvujemefuxa.pdfIn PDF document text
    • https://vevejeda.weebly.com/uploads/1/3/0/7/130776099/pinawe-jumemukibiw-takatin.pdfIn PDF document text
    • https://xijonezamo.weebly.com/uploads/1/3/1/4/131407630/9580453.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f87dbb4e9214.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369520/normal_5f87db8845a4f.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/9a8b9767-fe5b-467e-b0de-d3ae4b9571a8/mogivekumoxubanom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebf4ce94-4d3d-4a15-b27b-a82864940bb1/lotaxemibifopos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cdc81ba-a3de-4626-abf1-6dd2bbdeb2d8/rasomajugusududimobonarig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/552546a1-995a-449d-bf0c-50fb70365826/24343891332.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f5f9b0e-8d09-4259-8040-36ff73de317c/gajonunufijakof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9ac71a-ef08-4789-b95b-e7caf58af127/36701271616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cc29696-eca4-4c36-8ec9-18074943eb1a/50344959.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_off00006cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD0 5268 bytes
SHA-256: b35c6b571784385bf5c195905fccb467149450fe55a3803bf1aa3b7e9392d780
font_01_sfnt_off00007ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EBE 10248 bytes
SHA-256: 11dee6b70a0df91d941cd00365ce819ea1dd6c86a2c7f9e58fbe02d561d6a7c6

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