Malicious PDF — malware analysis report

Static analysis result for SHA-256 13fea318775df875…

MALICIOUS

PDF

45.7 KB Created: 2020-10-09 05:17:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 33013e12ef8de996b2cd9f8c113e76d6 SHA-1: c914a128dcae101bccaf8d95a992fa1414c728a1 SHA-256: 13fea318775df8755ba28a54cfdf8511bce7bdbd30906938f87aff5199129c3c
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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=civil+war+overhaul+mod In PDF document text
    • https://site-1044067.mozfiles.com/files/1044067/bonagejeduz.pdfIn PDF document text
    • https://site-1036685.mozfiles.com/files/1036685/60798246148.pdfIn PDF document text
    • https://site-1036775.mozfiles.com/files/1036775/64229441888.pdfIn PDF document text
    • https://site-1036761.mozfiles.com/files/1036761/tipevepep.pdfIn PDF document text
    • http://files.villariwestboro.com/uploads/1/3/1/0/131070523/baxurodikobelozidofi.pdfIn PDF document text
    • http://files.bestclubsnyc.com/uploads/1/3/1/6/131637316/rexejudu.pdfIn PDF document text
    • http://doxujoxow.fsahome.org/uploads/1/3/1/3/131398225/gutokasete.pdfIn PDF document text
    • https://site-1036934.mozfiles.com/files/1036934/gotowefipodo.pdfIn PDF document text
    • https://site-1037875.mozfiles.com/files/1037875/muraxavinajokonezawamux.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/pizelavafaxuzuleru.pdfIn PDF document text
    • https://site-1036832.mozfiles.com/files/1036832/39199224327.pdfIn PDF document text
    • https://site-1037094.mozfiles.com/files/1037094/15551782526.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/1/0266/8317/9198/files/zizijama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/6436/9574/files/sidopuvukolal.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006130.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6130 4944 bytes
SHA-256: 00e15c93f1b55939651c119c9fab4084199aaff1fe46bc0c4b1f2e7e82cce015
font_01_sfnt_off000071dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DD 10352 bytes
SHA-256: f78bdd49f626a7cf932c45260164a415c3020fd2f498d3cf234b17fb6635555f
font_02_sfnt_off00009532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9532 16076 bytes
SHA-256: 050cca2678d7435c270027ff58d84efa212ea3c5592871ae9bdc0d1e185112d0