Malicious PDF — malware analysis report

Static analysis result for SHA-256 708205a51e40e27c…

MALICIOUS

PDF

42.1 KB Created: 2020-10-06 23:56:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: cde4f145a55e3101c440b557ed2f4427 SHA-1: 1b831d78e33895fec84df5990ca3ac2f749f29ab SHA-256: 708205a51e40e27c89c7e55196501fb76a4de3e5db2a41ac2762a316d583d472
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=french+tanks+in+ww2 In PDF document text
    • http://files.bayoubugjigs.com/uploads/1/3/0/7/130775649/forufumarok-lazibofer-lodepokosinu-tesegozuzifos.pdfIn PDF document text
    • http://ralegupo.remodelcostspreadsheet.com/uploads/1/3/1/3/131379121/toroxugofijefemoza.pdfIn PDF document text
    • http://files.ylangylangspa.com/uploads/1/3/1/8/131857983/linaligelas.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/fuxigefinazazazirulikem.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/bupadisibisewigon.pdfIn PDF document text
    • https://site-1039600.mozfiles.com/files/1039600/sakerukisugopumuzode.pdfIn PDF document text
    • https://site-1036639.mozfiles.com/files/1036639/53848905789.pdfIn PDF document text
    • http://files.elzanismit.com/uploads/1/3/1/8/131856664/raxexavidisab_ruboxejit_vevexewawowu.pdfIn PDF document text
    • http://rikifux.masterclass-editing.com/uploads/1/3/1/1/131164573/puviteseselapi-sagajalobi-xurori.pdfIn PDF document text
    • http://files.saravongillern.com/uploads/1/3/0/7/130776142/9ca1b2b923132d.pdfIn PDF document text
    • http://files.babymyo.com/uploads/1/3/2/7/132710743/vevezelab-vazejo-fifodokaj.pdfIn PDF document text
    • http://files.originalartbyjoe.com/uploads/1/3/1/6/131637583/a5089ecf7391eed.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_off00006757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6757 5100 bytes
SHA-256: c15443c4368f8d64cfe7cf5f1720a645ee2f4f6480452a2a4963c5e697806a1b
font_01_sfnt_off000078c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78C2 10412 bytes
SHA-256: 92ebdd3ea72cdbda04150b8f56f341b936538e0974139e705cf7240cc81781e4