Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb07da09aed09bc5…

MALICIOUS

PDF

77.8 KB Created: 2021-03-18 22:13:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 54eac31ab696bd2e186d40fcc5ebf71e SHA-1: 71bf3fac89aec8fc18a4585ca20baf6243647633 SHA-256: eb07da09aed09bc52b248096c4853f8122c7afbdc7903692bbd31960fa02064a
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 0.9998

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://dafemum.ru/wb?keyword=apple%20time%20capsule%20fan%20replacement PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4410431/normal_5fcb2ee765f3f.pdfIn PDF document text
    • http://gozenozidejon.22web.org/55406662532.pdfIn PDF document text
    • http://xiluzoxasefeb.iblogger.org/laloximuv.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/remington_1187_tactical_carrier.pdfIn PDF document text
    • http://xesapuwax.mywebcommunity.org/how_to_get_a_furby_to_work.pdfIn PDF document text
    • http://tevutubiwij.getenjoyment.net/89219987276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372383/normal_60451004511d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409393/normal_5ffe96ef8399d.pdfIn PDF document text
    • http://zozamowewideno.mypressonline.com/81209849918.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fadifisevak.epizy.com/carbon_footprint.pdfIn PDF document text
    • http://limirosu.rf.gd/13089692607.pdfIn PDF document text
    • http://welegem.epizy.com/90322553424.pdfIn PDF document text
    • http://mekazejirorarad.epizy.com/lista_de_verbos_regulares_en_ingles_pasado_simple.pdfIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_1cd0c3df7ea146958d09d5c813f54a99.pdf?index=trueIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_33c924cd83b24d4f905094afa72a90a4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/mudozojuxefar.pdfIn PDF document text
    • http://movetusogajugup.epizy.com/how_to_clean_an_old_kenmore_sewing_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/how_to_answer_interview_questions_youtube.pdfIn PDF document text
    • http://kutepiguzusudax.epizy.com/release_and_indemnity_agreement_template.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_off0000f229.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF229 5152 bytes
SHA-256: 927bf5c6764d76c70cb21645578cbb37e74c81fa0ac2c4e771c2b986c94a66e2
font_01_sfnt_off00010397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10397 11360 bytes
SHA-256: ed52f735cca138463863f1f278d68a11488dd975566c44b98fc28a3ae9aece10

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