Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e1868467857116…

MALICIOUS

PDF

42.6 KB Created: 2020-10-03 19:12:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 02c9c0bd02ab277fd81d2b6f165c08ec SHA-1: 23c168d78f7d7262317009a0f4e85b014002ef1d SHA-256: 94e18684678571168439620ae0beaa908592eb7769c422c35a3850a55bb5d3f5
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=adresse+resiliation+bpce+assurances+caisse+d%2527epargne In PDF document text
    • https://site-1036689.mozfiles.com/files/1036689/8933294143.pdfIn PDF document text
    • https://site-1038861.mozfiles.com/files/1038861/ferilijomerubav.pdfIn PDF document text
    • https://site-1036632.mozfiles.com/files/1036632/meburidenimevete.pdfIn PDF document text
    • https://site-1038714.mozfiles.com/files/1038714/62668085714.pdfIn PDF document text
    • https://site-1039992.mozfiles.com/files/1039992/muxerijuwinitig.pdfIn PDF document text
    • https://site-1037241.mozfiles.com/files/1037241/22801566110.pdfIn PDF document text
    • https://site-1038401.mozfiles.com/files/1038401/92694322811.pdfIn PDF document text
    • https://site-1038898.mozfiles.com/files/1038898/90666079051.pdfIn PDF document text
    • https://site-1040982.mozfiles.com/files/1040982/zekovaruwunifavavid.pdfIn PDF document text
    • http://tasozo.flowersindublin.com/uploads/1/3/1/4/131454215/xidujasawovab.pdfIn PDF document text
    • http://files.almostathirdgrader.com/uploads/1/3/1/3/131381612/tazuduxer_pefiguz.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/1/0433/1172/6750/files/gajatuzofawuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5685/6230/files/positive_adjectives_that_start_with_letter_l.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/4231/1839/files/katy_high_school_graduation_2020.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_off000062d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 5404 bytes
SHA-256: 7dd6a2fe128ebcc79f542c681073d2bb2b9fbc09557035257905b37b6f468ac5
font_01_sfnt_off00007545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7545 12052 bytes
SHA-256: 9d0caefb74956ae61938edf8342985c8208e631453dbbec55610ae75ef7f1fa1