Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea792ad0f3ec6a7d…

MALICIOUS

PDF

81.7 KB Created: 2021-02-16 21:59:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 34984e3b7489cf91ca823f4dca3b253a SHA-1: 25303902dfdc1c9400ffa71ea9ab82cb27abd0e8 SHA-256: ea792ad0f3ec6a7d40cd3c0bb1c8d963ef5a8d162c383feb87f780c684cb5d56
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though partially corrupted, contains text related to a movie title, likely used as a lure to encourage clicks on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/strik?utm_term=un+puente+hacia+terabithia+pelicula+completa+en+castellano PDF link annotation
    • http://miworusak.iblogger.org/asbestos_cement_sheet_replacement.pdfIn PDF document text
    • http://100p-f.ru/mainstays_parsons_cubby_tv_stand_instructionso2pkc.pdfIn PDF document text
    • http://wiregabjuk.fun/73474091537bljqc.pdfIn PDF document text
    • https://jafobepajimo.weebly.com/uploads/1/3/4/8/134881918/34661b26.pdfIn PDF document text
    • http://natlab.ru/ditepeskih1s.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/fagosexum.pdfIn PDF document text
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/lokituxirali.pdfIn PDF document text
    • http://1xbets-regs.site/vonowatolufuf7kwrl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408001/normal_5fc869b21a2a9.pdfIn PDF document text
    • https://jaxowukijov.weebly.com/uploads/1/3/0/9/130969500/c3ac09b2eac.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/h3jenCA/tovewuwolawozezisofederes.pdfIn PDF document text
    • https://cdn.sqhk.co/janezewufaj/ToIgdif/manaxafasazirat.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/xobumodola_belejizojabaru.pdfIn PDF document text
    • http://firstdoctor.xyz/flag_day_worksheets_first_gradeqhoit.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD73 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off0000dd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD67 5188 bytes
SHA-256: 83f2d3a60ef2f009bb5ad35a69d4d5e9e0173ef5b3d0bbfe4ab225b9eed403b2
font_02_sfnt_off0000eeca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECA 11224 bytes
SHA-256: 0701e2ec1124b5f6358d3f626b9b91b7486190555ba8f04feb9082e19f287ef5
font_03_sfnt_off00011398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11398 16168 bytes
SHA-256: 794d8cc090a449e0d460036171b2d5b2c749cb0dc3f17972c44626ada68ee3d8
font_04_sfnt_off0001289e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1289E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378