Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e5e7ac0ff479982…

MALICIOUS

PDF

74.9 KB Created: 2021-03-19 12:50:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0537bb64a9ed6c037b5ecf3c7a30e44f SHA-1: e6c4ac7b09f90cb979b77d1bd9f173f37dbc6f5b SHA-256: 6e5e7ac0ff479982ce1de26ec9af54bb2a929320fabd32738399a3a2670cbe12
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an invoice-themed lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://baarspo.ru/strik?utm_term=how+to+record+sales+discounts+in+accounting PDF link annotation
    • http://zefedupawomodos.22web.org/96565206876.pdfIn PDF document text
    • http://telovajov.medianewsonline.com/46809720378.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477387/normal_5fd2173cd8688.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376852/normal_5ff425e55a6a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422168/normal_6006923b45067.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/qidhgXd/fafugufizelut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481067/normal_60121da60e7c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_60510bd905d09.pdfIn PDF document text
    • http://bunagutafa.getenjoyment.net/kazuziguziwajakajixixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369494/normal_602292a465d6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366020/normal_600610447d587.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/EaibVbk/siren_beat_ringtone_download_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_5fd16132dffdc.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/Xhdgxhh/95492606496.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibekuxamawijoz.epizy.com/13422519222.pdfIn PDF document text
    • http://wisunomimat.epizy.com/49873407789.pdfIn PDF document text
    • http://wajifinome.epizy.com/battle_royale_computer_game_no.pdfIn PDF document text
    • http://rufofexejojar.epizy.com/local_tv_guide_denver.pdfIn PDF document text
    • http://wovivujuxeko.epizy.com/wifoburegin.pdfIn PDF document text
    • http://larifobuxol.epizy.com/benzoato_de_sodio_como_conservador.pdfIn PDF document text
    • http://kuzemepusiloj.onlinewebshop.net/refunadu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C3 5160 bytes
SHA-256: 7ef344df94c29b31b0e774a0631390b9c6bac7fc35f88723a525ac090d915573
font_01_sfnt_off0000f86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86F 11300 bytes
SHA-256: 3d55a9b569c3c51b92490eac84e0e1eacc7849c111b8c56bea03ceb426bab228

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