Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed359b7f0df644a…

MALICIOUS

PDF

34.4 KB Created: 2020-10-02 03:04:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: da7202e59dba0831bd8ba2ff23788629 SHA-1: 0ac0e17dddb5536f86a748c841b3511f34ce9253 SHA-256: 3ed359b7f0df644a5bc251d09e5f7bb2f577a23d716646f818a512d22eefcfa2
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=metamorfik+ne+demek In PDF document text
    • https://site-1039414.mozfiles.com/files/1039414/kafuxazimasozafulok.pdfIn PDF document text
    • https://site-1039801.mozfiles.com/files/1039801/82743342331.pdfIn PDF document text
    • https://site-1036745.mozfiles.com/files/1036745/sukekafagalinanunuk.pdfIn PDF document text
    • https://site-1036665.mozfiles.com/files/1036665/69085136847.pdfIn PDF document text
    • https://site-1037214.mozfiles.com/files/1037214/kikukugore.pdfIn PDF document text
    • http://vegulusix.ameliasherry.com/uploads/1/3/1/3/131379730/kejelebizogela.pdfIn PDF document text
    • http://files.mrskiriluk.net/uploads/1/3/1/3/131380058/vofumupe_xogopatajizipug.pdfIn PDF document text
    • http://files.phoenix-wellspan.com/uploads/1/3/1/6/131606690/lupuforofi_kiduzalu_bovonebulo.pdfIn PDF document text
    • http://gubane.nevadateach.com/uploads/1/3/1/0/131071220/7703303.pdfIn PDF document text
    • http://files.ayusayurvedayoga.com/uploads/1/3/2/3/132303035/xezek_jituwolivofo_jugajoziwe.pdfIn PDF document text
    • http://jelar.hickmanfootball.com/uploads/1/3/1/4/131437044/xineli_tiwumimagivaraf_xazubaxeraxalun_tebuwiwim.pdfIn PDF document text
    • http://files.kaiderlaw.com/uploads/1/3/1/4/131409385/mexigofefagaxi-zugaginava-mefilo-zobodirotulala.pdfIn PDF document text
    • http://files.michaelhogarth.com/uploads/1/3/0/7/130776661/1257a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off000046c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46C9 4912 bytes
SHA-256: b87b8cbaa5ea9e7bf9a7d0e37a246edb592d1200998d5affef8fe369cd16fdb0
font_01_sfnt_off00005777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5777 11340 bytes
SHA-256: 5bd44ece8f33862d062cd3617c324e3679a36c86a97540a237bf36f9c8a3ec84