Malicious PDF — malware analysis report

Static analysis result for SHA-256 842d85e2380a8553…

MALICIOUS

PDF

76.7 KB Created: 2021-03-20 13:26:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f6b4fac8260eaa1667877a80b9874864 SHA-1: 704fffae63633117d6165dd9d1b910589e7bf8e8 SHA-256: 842d85e2380a8553211ce851f82233e4fa8f93152bfa1faf29d57352fe579cef
174 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains heuristics indicating it is a payment redirection lure, suggesting a phishing attempt. It embeds external URIs, including one pointing to 'nipisod.ru', which is likely part of the phishing infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to exploit vulnerabilities or redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
  • 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://nipisod.ru/strik?utm_term=us+fda+food+safety+modernization+act+pdf PDF link annotation
    • http://opt15.ru/vomilobadenawiwubabor41adz.pdfIn PDF document text
    • http://kleomaften.online/dutogojupiguxunuxodob16wxc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471704/normal_6023e0cbb1745.pdfIn PDF document text
    • http://joy-todays.online/doom_2_rpg_pcbncrc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478132/normal_6020d02f103dc.pdfIn PDF document text
    • http://anarchymedya.com/jofotaxuserifidokoti2k7.pdfIn PDF document text
    • http://nudagape.22web.org/powermax_45_price.pdfIn PDF document text
    • http://uber-global.com/260737974422zq8c.pdfIn PDF document text
    • http://idealica-italiauficiale.website/tipamenadeketawefupabiqgmlj.pdfIn PDF document text
    • http://juxisuzuvu.iblogger.org/rolesumu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365598/normal_5ff14f874749e.pdfIn PDF document text
    • http://badodamibevije.iblogger.org/harbor_breeze_ceiling_fan_remote_reset.pdfIn PDF document text
    • http://lajokuxix.22web.org/25778333637.pdfIn PDF document text
    • http://opensol.xyz/53924514841m8keo.pdfIn PDF document text
    • http://pusedoropeseb.66ghz.com/diabetes_guidelines_ada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425514/normal_6054d6377b304.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zukowuneze.rf.gd/facebook_mod_apk_no_ads.pdfIn PDF document text
    • http://pevurevakube.rf.gd/sample_of_a_business_plan_for_a_restaurant.pdfIn PDF document text
    • http://mabofikoparu.epizy.com/steel_magnolias_script_amazon.pdfIn PDF document text
    • http://tonerud.epizy.com/menitojoxalogulinolonab.pdfIn PDF document text
    • http://rokutore.rf.gd/50910007785.pdfIn PDF document text
    • http://vamavom.epizy.com/79907709986.pdfIn PDF document text
    • http://sawozepanoludib.rf.gd/90899196139.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_off0000ee20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE20 5412 bytes
SHA-256: c94cdb9764ea44a0b6449ea28871592b42d1e20a62998f9210e03e12bea601b2
font_01_sfnt_off0001008b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008B 10812 bytes
SHA-256: bf3fa442d65f16b2978e1302b321c59f011e4209ea719c460bd383d146ddc0d7

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