Malicious PDF — malware analysis report

Static analysis result for SHA-256 669c5134083c4547…

MALICIOUS

PDF

85.0 KB Created: 2021-02-28 10:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6fde54eef80266c162debc6cd6a1eb3f SHA-1: 0fe88d970d44fb86f0f490144497d58b22f90359 SHA-256: 669c5134083c45470352e76b8595ec9db94adb7a6c1b94a40fc239bd53c09732
126 Risk Score

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. 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 0.9995

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://xajibur.ru/wix?keyword=how+old+was+jacob+when+he+died PDF link annotation
    • http://ryukzak.digital/62330530138vlc2r.pdfIn PDF document text
    • https://sokonova.weebly.com/uploads/1/3/4/3/134322069/xusele_sazimi.pdfIn PDF document text
    • http://twenty-promo2020.ru/what_is_the_difference_between_32_and_64_bit_computers05p0p.pdfIn PDF document text
    • https://pomugulawes.weebly.com/uploads/1/3/0/8/130814995/2767151.pdfIn PDF document text
    • https://zapamapat.weebly.com/uploads/1/3/0/7/130775391/mozitenapobe_rekom_demobud_sejeluri.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/nolalipanaxufujalukovegi.pdfIn PDF document text
    • http://datingdate.site/95532344365emh8a.pdfIn PDF document text
    • https://kulabukotijol.weebly.com/uploads/1/3/4/7/134703535/govinatenumu.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/gobalamajuvol_daguvugojari.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/redawadeperiru.pdfIn PDF document text
    • http://tonedomopoja.scienceontheweb.net/99233483335.pdfIn PDF document text
    • http://vuwimoxit.mygamesonline.org/98586571231.pdfIn PDF document text
    • https://tugesarafexo.weebly.com/uploads/1/3/5/3/135319839/jagoz.pdfIn PDF document text
    • https://xevoniwibefi.weebly.com/uploads/1/3/5/9/135984774/zikurapikazavan-kibuxo-buxuwibumo-noxuxanowanepup.pdfIn PDF document text
    • http://cabinetshub.xyz/59973789171oysna.pdfIn PDF document text
    • https://safipeta.weebly.com/uploads/1/3/1/4/131408280/gutusatadupa.pdfIn PDF document text
    • https://benefirezunaxo.weebly.com/uploads/1/3/4/8/134864331/5706908.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/gomakobez/variables_and_expressions_answers.pdfIn PDF document text
    • http://rivenoke.onlinewebshop.net/solupalivixojegamoxa.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/mabebofujijogadupepewel.pdfIn PDF document text
    • http://mawokale.myartsonline.com/molecular_biology_and_evolution_of_cancer_from_discovery_to_action.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/24458889043.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_off000111e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E5 5200 bytes
SHA-256: ab97c867e1ef16250b3aef6f4a17cb719a000c92f0715de888d833522dfcd7f4
font_01_sfnt_off0001239f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1239F 10208 bytes
SHA-256: b4ad6947305399169eea74fed153983a359f4d5ee8c21a2301bbb52d1834cb35

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