Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3619f41679b7621…

MALICIOUS

PDF

70.5 KB Created: 2021-03-29 21:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6ae6059e6c2257981be65c6d69d28e31 SHA-1: 5f0a8972375236330865571e7eae0f262841cd01 SHA-256: f3619f41679b76211a2454c37017d1ea0c8a2366015e1ec46e2cdb1bfff6ca42
126 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. 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 0.9996

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
  • 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://kuzutuzo.ru/wix?keyword=gradual+release+model+definition PDF link annotation
    • https://vetebifarex.weebly.com/uploads/1/3/4/0/134016991/tirakiji-gabokapede-dowegalapawez.pdfIn PDF document text
    • http://wapadax.scienceontheweb.net/refamiwalurolaroledu.pdfIn PDF document text
    • https://bebemabuvi.weebly.com/uploads/1/3/1/4/131453051/1309319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_601c7d5d3f35e.pdfIn PDF document text
    • https://wofugegiperezaj.weebly.com/uploads/1/3/4/5/134528457/gatumuvekaxufi.pdfIn PDF document text
    • https://wizawexixif.weebly.com/uploads/1/3/4/4/134472694/49ae95a0aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497078/normal_5fea00fdd6297.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449618/normal_5ff7cfbaa1252.pdfIn PDF document text
    • http://jawomubinuj.iblogger.org/10037160392.pdfIn PDF document text
    • https://votujejigep.weebly.com/uploads/1/3/1/3/131380583/5280141.pdfIn PDF document text
    • https://xowemaxixedire.weebly.com/uploads/1/3/5/3/135325030/vupugaratogosa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_604fd4ea942d4.pdfIn PDF document text
    • http://sinoxaju.mygamesonline.org/towof.pdfIn PDF document text
    • https://movalibixijol.weebly.com/uploads/1/3/2/6/132682530/fedudazenuli-loruzig.pdfIn PDF document text
    • http://suzamajotibe.mywebcommunity.org/kanesudusiwarejimefe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388815/normal_5fe06f004dfb4.pdfIn PDF document text
    • https://mabatuba.weebly.com/uploads/1/3/5/3/135303696/wedize_xirijira_belowu.pdfIn PDF document text
    • http://kavakedego.scienceontheweb.net/excel_cheat_sheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4826ee5d-bf9b-48a5-8e8c-c55c75648027/zagegexuxix.pdfIn PDF document text
    • http://xoxigibutu.epizy.com/cv_maker_software_free_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/336259fe-025b-409c-b646-7f8854bdb43f/88369508699.pdfIn PDF document text
    • http://babematalal.epizy.com/72939019507.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_off0000d76b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76B 5084 bytes
SHA-256: 2e66bb376652ebecaa0c96fd482f3487c8a9c9d1dccb4512d147ca839b0a6190
font_01_sfnt_off0000e8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A1 10296 bytes
SHA-256: 5d57d481aff37df1949e263653e7d3570be7e94a018bca95c73f379cdf16fd83

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