Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7095c78ccea668…

MALICIOUS

PDF

44.8 KB Created: 2020-09-29 19:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ce2420eca396a418c966942a962595e1 SHA-1: a19989c837c371be0defb7465aa2be24e2f8adfd SHA-256: 1f7095c78ccea668e876632095829e552942af8d1d8296f496ebd1fd2760e671
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=anyone+who+had+a+heart+sheet+music+pdf In PDF document text
    • http://gunuvuwa.sarahduer.com/uploads/1/3/1/4/131407802/vadavopugifas.pdfIn PDF document text
    • http://files.uttersurrender.com/uploads/1/3/2/3/132302764/84b953dab44bb1e.pdfIn PDF document text
    • http://sosug.trevoultersouthdevons.com/uploads/1/3/1/6/131637719/sezar-numiputidimuge.pdfIn PDF document text
    • http://files.claireslater.co.uk/uploads/1/3/1/8/131856158/novewoxedof.pdfIn PDF document text
    • http://gopexak.papermillbluffs.com/uploads/1/3/1/3/131383790/4698401.pdfIn PDF document text
    • http://files.stickyfingersfiberart.com/uploads/1/3/2/6/132682829/fevidijojis.pdfIn PDF document text
    • http://files.luciopetroccione.com/uploads/1/3/1/4/131453944/67e41e.pdfIn PDF document text
    • http://ropen.mi-passion.com/uploads/1/3/1/4/131453945/4023040.pdfIn PDF document text
    • http://files.loynohonors.com/uploads/1/3/2/6/132695730/839f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/76d2c750-58a7-4808-bc1e-c94302a339b6/27236155806.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c45c09-a54b-4bdc-bef0-cd58c0fb5e42/guwowasipegozixilisop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7f87d5-175b-4cc1-b26b-85c637709b68/kuwewekopaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b20fccb7-7111-417f-956f-f3b9340761a5/50016280220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/467a222d-3f0e-430e-8cd5-384f003c2bac/jibupabilifufopusimafide.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_off00007007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7007 5544 bytes
SHA-256: 47137a3aac1deaf4558e43b1e2e35143a630d8b010feec43bda12e23561b5574
font_01_sfnt_off000082d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D3 10420 bytes
SHA-256: 13e0aa42c2bec0bf308f9874f683ab29e497b1a63dfa635235f3d11a132f85b8