Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15bb09e58d1640f…

MALICIOUS

PDF

79.1 KB Created: 2021-03-14 21:47:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c8e7dc4a4fd2d8a7baa2b17b8bb06c0a SHA-1: c25dc2d9f5eee8dd988d6aa7d4d3cd9398af0d2a SHA-256: e15bb09e58d1640f722c67a36907a9aebf6f9b4d70eabb42394da89fbbebac11
184 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.7551

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 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
  • 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://leonvi.ru/award?keyword=arya+samaj+marriage+application+form+pdf PDF link annotation
    • https://tevoletefe.weebly.com/uploads/1/3/1/6/131606261/9970682.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/what_is_my_love_language_meaning.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/e10a01f398.pdfIn PDF document text
    • http://sekujirimabasas.getenjoyment.net/61161909702.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/198c9.pdfIn PDF document text
    • http://nakijeku.mygamesonline.org/25440347828.pdfIn PDF document text
    • https://mirepabokotixiz.weebly.com/uploads/1/3/2/7/132712407/nerefikutapetete.pdfIn PDF document text
    • https://nojemalof.weebly.com/uploads/1/3/0/8/130873850/tabomuwurubopol_maluworogirutul.pdfIn PDF document text
    • http://midimox.getenjoyment.net/6677915389.pdfIn PDF document text
    • https://xeludelibiw.weebly.com/uploads/1/3/4/3/134371965/9606773.pdfIn PDF document text
    • https://begobaxu.weebly.com/uploads/1/3/5/3/135336669/jovusovilunititaze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f4b9ed98-44c1-44e6-9966-d9817cd43de7.filesusr.com/ugd/9ced5d_d694847934144f76b12c36425be735ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/29348305566.pdfIn PDF document text
    • http://kivozusemu.atwebpages.com/mr_heater_big_maxx_installation_video.pdfIn PDF document text
    • http://wodowepakimeko.onlinewebshop.net/usb_wiring_diagram_micro.pdfIn PDF document text
    • http://keregimuw.onlinewebshop.net/85414452199.pdfIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_67c5a53bc934438481bc75b2825954bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fovezewi/ansible_template_variable_name.pdfIn PDF document text
    • http://ruzakema.onlinewebshop.net/rich_text_document_to_docx.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/el_cajon_online_police_report.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/wills_eye_pediatric_ophthalmology_fellowship.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/exchange_2010_mailbox_delegation_report.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D6 5644 bytes
SHA-256: 89d2d11727b1e7fe1fca20e020a1c3c2d20da573acd473f20ca4845d0488274b

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