Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d6b5f9cac2fc252…

MALICIOUS

PDF

46.1 KB Created: 2020-10-03 17:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 12594481f1237e0914cbcf9d336a82fd SHA-1: 7ba9cb5cd47f231c0584f12774aec7868d962eea SHA-256: 9d6b5f9cac2fc252fc0f57095879b81e47c5c422c193923eeb0da6ac53b46ad5
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=500+watts+amplifier+circuit+diagram+pdf In PDF document text
    • http://files.buttecollegebcea.org/uploads/1/3/1/4/131453998/2695778.pdfIn PDF document text
    • http://files.fcaky.com/uploads/1/3/1/4/131483719/tibepede.pdfIn PDF document text
    • http://gabubix.danilopoulos.com/uploads/1/3/0/9/130969204/wades-doponeta-jazek.pdfIn PDF document text
    • https://site-1036930.mozfiles.com/files/1036930/87212217547.pdfIn PDF document text
    • https://site-1038979.mozfiles.com/files/1038979/tegexiwovubizutenara.pdfIn PDF document text
    • https://site-1036985.mozfiles.com/files/1036985/resisapako.pdfIn PDF document text
    • https://site-1036696.mozfiles.com/files/1036696/nekajipazitop.pdfIn PDF document text
    • https://site-1039489.mozfiles.com/files/1039489/zewapamo.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/626f2013-6b0b-4337-9bd3-6193683af473/tarevirep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6acc091d-96ff-4a0c-9da3-960a263a0c6e/91088306096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/760e63d8-bac3-48ec-939e-850dee57fe79/putamegele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb226f66-f27f-49ce-a46b-f5a9341f358d/97642148296.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_off00006649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6649 5404 bytes
SHA-256: d24bef8805acb7a940c9b856967cc446de004e5dfe61c55b6e9adbebe20c103f
font_01_sfnt_off000078b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B9 10644 bytes
SHA-256: 600f346da55c3f38b4f3d9c8ca94d0513db5deb78504034ebd87b84dc8964a5d
font_02_sfnt_off00009d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D18 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f