Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b692e8e7a6f85f2…

MALICIOUS

PDF

65.8 KB Created: 2021-01-16 10:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: d0039014177f558314df09baa9e20472 SHA-1: 8b914ffa91c9f58ba447b418364e279db0a2cef0 SHA-256: 3b692e8e7a6f85f2e75b6886d19c70f2219a5dd62e72aa09777463da533054b3
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffine.ru/wb?keyword=literature%20review%201000%20words%20example In PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/sifume_tilepegumakuja_negimis_tutamopijaj.pdfIn PDF document text
    • https://site-1171718.mozfiles.com/files/1171718/how_you_say_feisty_in_spanish.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f8a9c91c961f.pdfIn PDF document text
    • https://site-1166068.mozfiles.com/files/1166068/why_does_my_bitcoin_wallet_address_change_coinbase.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5fa44e3920e08.pdfIn PDF document text
    • https://site-1180237.mozfiles.com/files/1180237/les_amphibolites.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490251/normal_5fc4ddac64a4e.pdfIn PDF document text
    • https://site-1180896.mozfiles.com/files/1180896/safeza.pdfIn PDF document text
    • https://site-1172403.mozfiles.com/files/1172403/25645925073.pdfIn PDF document text
    • https://kalabuzamebuku.weebly.com/uploads/1/3/4/3/134339718/jatovaguvida_segonaf_sipixusufito_zadawuripawizef.pdfIn PDF document text
    • https://fedufifor.weebly.com/uploads/1/3/4/8/134894833/togaj.pdfIn PDF document text
    • https://site-1177426.mozfiles.com/files/1177426/sojopukikosuxipa.pdfIn PDF document text
    • https://site-1175610.mozfiles.com/files/1175610/contradicts_crossword_answer.pdfIn PDF document text
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/2690351.pdfIn PDF document text
    • https://site-1168415.mozfiles.com/files/1168415/5916076561.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_off0000c5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5BC 5460 bytes
SHA-256: e9a397b71fe9e095f1c8a58a23fb5df7f07692f0f091189a5b9dde36ebce7570
font_01_sfnt_off0000d84f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84F 9980 bytes
SHA-256: 1bd1389010c759635adbdd3e607b65b6abf00ecdaf1760fd65b35564c36a611f