Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6ed95bc83bfed08…

MALICIOUS

PDF

79.7 KB Created: 2021-03-21 11:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 2ab3ebc02ee5de82b35684ecc382c7b9 SHA-1: ea10d41869a088da55a965b310cc82aafac2090a SHA-256: f6ed95bc83bfed084608d68121cc0276db0bac0bcd6919a173233871504deb12
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, particularly the one hosted on jumiwimov.ru, suggests a redirection to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports that the document is designed to host many links, likely for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jumiwimov.ru/award?keyword=inventory+turnover+ratio+formula+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377678/normal_5fcd7db26dbb1.pdfIn PDF document text
    • http://zikubuji.iblogger.org/office_open_xml_document._docx_to.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476272/normal_5fdf2a751e0ce.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/begijapogoxegetirididufem.pdfIn PDF document text
    • http://favarivizuna.medianewsonline.com/free_download_yasin_dan_tahlil.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/4419798885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405467/normal_6049337f7920f.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/72251465054.pdfIn PDF document text
    • http://situvupumu.medianewsonline.com/zarozi.pdfIn PDF document text
    • http://gonalotuturopil.mywebcommunity.org/jiwoburizobufabajumaxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373297/normal_5fe44fe0bf8e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_603b9b4261a8b.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/dell_e6410_keyboard_layout.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/29524519346.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zasepo/53745169268.pdfIn PDF document text
    • http://lavewas.epizy.com/lagu_austin_mahone_dirty_work.pdfIn PDF document text
    • https://s3.amazonaws.com/wozoxub/sulujitu.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/why_wont_my_minn_kota_ulterra_deploy.pdfIn PDF document text
    • http://lolunoxij.myartsonline.com/mugofevulukuponid.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/68048690047.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/straight_cable_color_code_name.pdfIn PDF document text
    • http://pobiludorigogok.epizy.com/49515046852.pdfIn PDF document text
    • http://nogibusap.epizy.com/modelo_de_capitulaciones_matrimoniales.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/child_care_activity_ideas_for_toddlers.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_off0000ec0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 5108 bytes
SHA-256: c2a5079b178db96e336c59826d3a179deb04c5ec1b7aae378662df62fb25155a
font_01_sfnt_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 20936 bytes
SHA-256: 6e6f3ecda89d66a38b1c6d6f9c9a20f5aceb89bffe733661404c22496a6720c3

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