Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be037f3d4535f33…

MALICIOUS

PDF

62.2 KB Created: 2020-11-08 01:32:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0bd93cb68d87ecfe58de8217e0e04140 SHA-1: 95f6839aeffe011a454fd06e5f782380d092acbb SHA-256: 1be037f3d4535f3311e1b079f731b3b816051efb408b948eaa80200b5e987253
194 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffine.ru/123?keyword=batchelor+middle+school+website In PDF document text
    • https://zenisitidijo.weebly.com/uploads/1/3/4/3/134309999/8879603.pdfIn PDF document text
    • https://bizevino.weebly.com/uploads/1/3/4/3/134320064/b0d785ff2ba587.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/babovidavut_puxoriropibadol.pdfIn PDF document text
    • https://beperiguvo.weebly.com/uploads/1/3/4/3/134320750/56bd94b.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/3905791.pdfIn PDF document text
    • https://vetaguluxidi.weebly.com/uploads/1/3/4/6/134656260/riwirexisonoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403118/normal_5f91d2e7c2d2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456699/normal_5fa2fed26a068.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/semicolons_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc04a89f-a8e3-46a5-8314-21a9d6209687/11225393683.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/numelopu.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/ludokirovojamuwozo.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/93264342333.pdfIn PDF document text
    • https://s3.amazonaws.com/sizadagazagaj/adobe_illustrator_full_course.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_off00009fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FC7 5392 bytes
SHA-256: 3051e1caef8d9d47d4fbe6054baf75962dfc977a27ec845a1d25d8b51405354d
font_01_sfnt_off0000b28c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB28C 5460 bytes
SHA-256: 2585ac8908593ab74f536f0b40ee6d4f46388014a3b4a35abc59ac2b24ce520c
font_02_sfnt_off0000c4fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FD 11444 bytes
SHA-256: ca654a7b1edae65ebb47a16d45d683bc297be3c39d2cfefec74518c08e36a8ba