Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f9cbf33dec5d315…

MALICIOUS

PDF

106.8 KB Created: 2021-04-14 01:28:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 199133b0f4097e6ef5551bf5b9916630 SHA-1: a7622e64f8299bc8f5188135e9580b65be786602 SHA-256: 1f9cbf33dec5d3159123cff2c86798f36dfb171d24ee604939e1e227d83e6e70
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 0.9994

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://botokaw.ru/strik?utm_term=small+company+financial+statements+pdf PDF link annotation
    • http://mifirejetevina.getenjoyment.net/augmented_matrix_problems.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383928/normal_6031ed1acac37.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448346/normal_5ff29166003d0.pdfIn PDF document text
    • http://muvepifare.mygamesonline.org/astros_2020_schedule.pdfIn PDF document text
    • http://organize.shop/the_vampire_chroniclesagzqo.pdfIn PDF document text
    • http://waxedeb.getenjoyment.net/68264456813.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410717/normal_6055b52151613.pdfIn PDF document text
    • http://hhizmet.com/916087273474buwc.pdfIn PDF document text
    • http://fruit-italy.space/tazakukujefopzq6rj.pdfIn PDF document text
    • http://soldonlakewood.com/how_much_is_a_used_nintendo_ds_worthazvln.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370547/normal_6043dab4defd0.pdfIn PDF document text
    • http://guxesux.22web.org/vegan_diet_plan.pdfIn PDF document text
    • http://jerimujolegem.medianewsonline.com/cours_nergies_renouvelables.pdfIn PDF document text
    • http://prizinsta.info/aluminio_propiedades_fisicas_y_quimicasdqhre.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_6046818c0163d.pdfIn PDF document text
    • http://zogaranana.22web.org/cost_accounting_income_statement_format.pdfIn PDF document text
    • http://tobufupevujuma.mygamesonline.org/acido_nitroso_ecuacion_balanceada.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bac325b5-3710-4a60-ba01-c1ac5e8a7650.filesusr.com/ugd/c111de_ff4e6d725f694d2497b675bb8a9578d6.pdf?index=trueIn PDF document text
    • http://dusetelonuzaj.epizy.com/jurnal_ampas_tebu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d53e0fc-6e0a-4817-81ad-fd4acaba3279/is_there_a_season_2_sharp_objects.pdfIn PDF document text
    • http://wefatuneramab.epizy.com/76343850385.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7622d71f-470f-4966-ad19-ebc3d4afda6c/books_to_read_to_my_unborn_baby_free.pdfIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_9c85906e2af84f2ebcf8470c79eae7c7.pdf?index=trueIn PDF document text
    • http://pixuxurarosu.epizy.com/guwufagogoxuxeroxogales.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae145536-e217-4349-b71f-da6ab461a517/oracle_database_security_checklist_xls.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_off00016167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16167 5408 bytes
SHA-256: 8052e4d02e64c6421901168e533b45ab4cac705556693d88c5c0c0165fa6e61b
font_01_sfnt_off000173c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173C6 11980 bytes
SHA-256: f75e4f5ad23dff407b40064aed84d534f75116dbb74de076c2a0ddd5d7db03d5

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