Malicious PDF — malware analysis report

Static analysis result for SHA-256 30403dd9320c3d0e…

MALICIOUS

PDF

77.3 KB Created: 2021-05-10 18:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2cf649b76539c59e236870782331d32a SHA-1: 1067a9dca2d114a67ad6d32f07b43e58515187bc SHA-256: 30403dd9320c3d0e1fa17b5d85e6e3e017880141de3d60db8477599dfe09a75d
66 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 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 0.9998

Heuristics 4

  • 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://xezojetit.ru/strik?utm_term=movie+maker+software+free+for+mac PDF link annotation
    • http://rijebipimaba.getenjoyment.net/91966550865.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384308/normal_603651035aa26.pdfIn PDF document text
    • https://wunobenera.weebly.com/uploads/1/3/4/8/134887230/zabivojujofom-somagufiteviroz-ribofow.pdfIn PDF document text
    • https://demifezi.weebly.com/uploads/1/3/1/3/131379940/560d8b.pdfIn PDF document text
    • http://4kuhd.me/93429980953vzofd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444369/normal_601974fe3e756.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416125/normal_5fc88b083a482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505159/normal_6051a0dc44ab0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500911/normal_5ff8f15b0e87f.pdfIn PDF document text
    • http://carinsusa.info/spectrum_math_workbook_grade_8_free92cvz.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/75618524665.pdfIn PDF document text
    • http://vostokzapad.su/hindi_to_nepali_language_learning69k6p.pdfIn PDF document text
    • https://kaxogabetex.weebly.com/uploads/1/3/4/3/134320086/061a05.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/jazuravazaguz/dopimiveforu.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/23125398037.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/sumosadudajadukujav.pdfIn PDF document text
    • http://tetirapop.epizy.com/41850739296.pdfIn PDF document text
    • http://tefuwileb.rf.gd/aceptarse_a_uno_mismo.pdfIn PDF document text
    • http://mepumubim.rf.gd/20993794546.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_off0000f2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BC 5216 bytes
SHA-256: 99c62a25975281eb1dd0431c6eb1a7efb1de06c62bc27b319c1235029a62adb1
font_01_sfnt_off00010485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10485 10344 bytes
SHA-256: 3226ebcdb9b3fd04d7880311816ad8aea6a9c44e02715171f690df1d8629699a

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