Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b3391af7de3615…

MALICIOUS

PDF

34.3 KB Created: 2020-10-03 21:59:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 652d77f9f5a9df54a44c5b0404024fd6 SHA-1: f2c6c0678cc13bb0933ca4be95e29b6c7878bf8c SHA-256: d5b3391af7de3615a1637b0c1be62de6cc1ba1735ba7d1a72ccd16665eb12750
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=baixar+livro+de+parasitologia+humana+neves+pdf In PDF document text
    • https://site-1037085.mozfiles.com/files/1037085/megesorupijev.pdfIn PDF document text
    • https://site-1036973.mozfiles.com/files/1036973/55094933019.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/dezafupowogulosigulafu.pdfIn PDF document text
    • https://site-1041773.mozfiles.com/files/1041773/juxax.pdfIn PDF document text
    • https://site-1040609.mozfiles.com/files/1040609/45806750518.pdfIn PDF document text
    • http://files.fitlikeyoga.com/uploads/1/3/1/3/131379329/repabij.pdfIn PDF document text
    • http://nekesigog.monacannation.com/uploads/1/3/0/9/130969858/nesupokote_xinobax_kisovawi.pdfIn PDF document text
    • http://ziwum.oberober.at/uploads/1/3/0/7/130739906/7754621.pdfIn PDF document text
    • https://site-1038908.mozfiles.com/files/1038908/robuponu.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/4972200561.pdfIn PDF document text
    • https://site-1036871.mozfiles.com/files/1036871/20827504959.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/48121069799.pdfIn PDF document text
    • https://site-1038510.mozfiles.com/files/1038510/zizemogiwuxovoradopakaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/56964168821.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4830/files/barbie_horse_adventures.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2658/6522/files/netojedexuga.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_off000044e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44E4 5632 bytes
SHA-256: 6c609337f40f2a8f19158ad26019051e7ae22d4a065c7ed8e77799c7131ec41d
font_01_sfnt_off000057ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57EE 11048 bytes
SHA-256: d63375b299a9d1cac188486900ab7d735c553827f914133e017f5cc3689a2e73