Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ab0ee03fb60e2d4…

MALICIOUS

PDF

75.4 KB Created: 2021-05-13 02:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c49ebba4c3516392480aa98cd1188faf SHA-1: 51d1be99f75479f6df4854b909f6ac31083a2279 SHA-256: 0ab0ee03fb60e2d480576cd5dc7bd308086dfbbd6a95c08e2d8f7874ed23f82b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

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://crophysi.ru/strik?utm_term=how+to+protect+data+from+employees PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462775/normal_5ffd9e0f10df5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417025/normal_6060235249d6b.pdfIn PDF document text
    • https://rudoliretumuw.weebly.com/uploads/1/3/4/8/134861944/cd744bf51.pdfIn PDF document text
    • https://toxutumopomepe.weebly.com/uploads/1/3/5/3/135327812/74f0e2ee1c71e2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379611/normal_605cae12951a2.pdfIn PDF document text
    • http://bigijawiv.scienceontheweb.net/cartoon_drawing_tutorials_for_beginners.pdfIn PDF document text
    • https://fisujokogawubi.weebly.com/uploads/1/3/2/7/132711991/748599f5c51db3.pdfIn PDF document text
    • https://nizidisifa.weebly.com/uploads/1/3/4/5/134505067/wakir_lekubaxe_jebezakaf_xupisonun.pdfIn PDF document text
    • https://kamefumude.weebly.com/uploads/1/3/4/0/134018396/7547ad38b68ba29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422620/normal_6000b72b40861.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453117/normal_603044732ebd7.pdfIn PDF document text
    • https://lanapovo.weebly.com/uploads/1/3/1/4/131437145/bafemedizu.pdfIn PDF document text
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/5032596.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/sikomoledo.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/16ad51cb-4347-4425-a30c-e0fe2d102404/how_to_write_formulas_for_binary_covalent_compounds.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/free_travel_logo_design_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/27421177488.pdfIn PDF document text
    • http://sekuwomexapa.myartsonline.com/likap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1102e7af-3e5e-4d90-b006-91e4fa677c9a/lapofeverozusava.pdfIn PDF document text
    • http://lexekuduwowig.atwebpages.com/branches_of_earth_science.pdfIn PDF document text
    • http://lawewil.atwebpages.com/business_process_flow_diagram.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_off0000e7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C3 5456 bytes
SHA-256: 0928fc8c2e34446be1800b82673157226db971dd16d6ed516dae8a4aeadac064
font_01_sfnt_off0000fa53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA53 10640 bytes
SHA-256: f944555f9e004d324fa64d7936673a4a19f6d4c8daed9a104240b769d6bb10f3

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