Malicious PDF — malware analysis report

Static analysis result for SHA-256 2192b0a1efdbf4d0…

MALICIOUS

PDF

44.9 KB Created: 2020-10-02 22:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 1bd773b4ea17508fea384e44a8e958e3 SHA-1: f346322b0c681f4efb851198658d2ebbee61bb0e SHA-256: 2192b0a1efdbf4d0a1697a1695cc1e97e307052c041af31e14cdc308fc75d782
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/strik?keyword=quimica+sanguinea+de+45+elementos In PDF document text
    • http://files.joseluisperezjim.com/uploads/1/3/1/3/131383553/gejuxab.pdfIn PDF document text
    • http://files.lowercreekcreations.com/uploads/1/3/2/3/132302998/81145341233912c.pdfIn PDF document text
    • http://files.gaus.com/uploads/1/3/1/4/131452801/rigebojalo.pdfIn PDF document text
    • http://rijaxoz.brokengroundpermaculture.com/uploads/1/3/0/9/130969153/a2a5fe84289d0f0.pdfIn PDF document text
    • http://files.upsydaisydesignstx.com/uploads/1/3/0/8/130874067/2762f.pdfIn PDF document text
    • https://site-1040374.mozfiles.com/files/1040374/rinuvuxokasafevutuwil.pdfIn PDF document text
    • https://site-1037265.mozfiles.com/files/1037265/53031993607.pdfIn PDF document text
    • https://site-1036639.mozfiles.com/files/1036639/56429044959.pdfIn PDF document text
    • https://site-1038958.mozfiles.com/files/1038958/sesejurijiviboreluxuwexa.pdfIn PDF document text
    • http://files.revivalmission.info/uploads/1/3/0/8/130874485/sifefezap_takesolizo_sosotajunimo_kamipebalodov.pdfIn PDF document text
    • http://pazupop.emporiumofcanton.com/uploads/1/3/1/3/131380600/1987213.pdfIn PDF document text
    • http://files.threechordcity.com/uploads/1/3/0/9/130969522/xudaripagajagonale.pdfIn PDF document text
    • http://dodoziron.madebymikky.com/uploads/1/3/0/7/130776436/5346281.pdfIn PDF document text
    • http://wuwulemu.drydenmontgomerypark.org/uploads/1/3/1/4/131407089/xunasapini.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
    • 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_off00005f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F74 5320 bytes
SHA-256: 858e4df53a9660738a88648f429989a975408b001b72010a28a3daa504497da5
font_01_sfnt_off0000717d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x717D 11648 bytes
SHA-256: b6d540881c6591e1a4303a2b1c42fed17bc894b4d85a315e43d6af0039d3e206
font_02_sfnt_off00009718.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9718 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333