Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed9391514d85da36…

MALICIOUS

PDF

75.3 KB Created: 2021-03-07 20:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 39cf37858a87eba72e31b19a218a006b SHA-1: 91cc41cb5dfdd5ab61a1cb4027737280e1fe2057 SHA-256: ed9391514d85da36a09fb0d95da7709fd4c8294b7f9b58d34d172bf01c0730ba
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 0.9995

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://maypoin.ru/wix?keyword=my+little+steamer+go+mini+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4458623/normal_600204fe76b8a.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/idjf7hd/mobobavemenojev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446762/normal_5fdf621bef83f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467285/normal_602515f24b007.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485939/normal_602d45accb2eb.pdfIn PDF document text
    • https://cdn.sqhk.co/lukuvekeliki/inhghgD/mueller_ball_angle_meter_valve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385437/normal_5fcf3ec9ebeeb.pdfIn PDF document text
    • https://gugagefa.weebly.com/uploads/1/3/4/3/134343265/bb963278.pdfIn PDF document text
    • https://puzelosepe.weebly.com/uploads/1/3/5/3/135317481/lilakajop.pdfIn PDF document text
    • https://cdn.sqhk.co/nomitusibop/ghhShaU/68400983736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468253/normal_603b3ddac56c6.pdfIn PDF document text
    • https://cdn.sqhk.co/midipumep/sNigfjb/pixelart_builder_for_minecraft_app.pdfIn PDF document text
    • https://bixolajulepu.weebly.com/uploads/1/3/4/7/134746591/1b7e2740ee.pdfIn PDF document text
    • https://cdn.sqhk.co/jajotulix/jfjhhdw/vector_security_corporate_phone_number.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/2ba8ab26-b6ca-45ad-a005-d08174b12f0a/object_oriented_analysis_and_design_text_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/362ee9a3-c762-461f-95db-d5476995cdea/bd_eclipse_needle.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/what_are_the_proposed_data_management_tools_being_considered_at_stepsmart_fitness.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db5ca639-c082-45bc-95b1-bd642b1ced65/jogujilunibak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33bd3727-3ed0-4a46-951b-ddc7a4d7ede4/prince_of_thorns_audiobook_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/jazamerijekufol/hp_officejet_4500_scan_software_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/ableton_template_maschine_jam.pdfIn PDF document text
    • https://s3.amazonaws.com/pukaridimupo/annamalai_tamil_movie_ringtones_free.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_off0000ea3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA3B 5228 bytes
SHA-256: 475ccf9c3563aba992ea371847f292bffa3dad7af66d42361e3657f3ba97dafe
font_01_sfnt_off0000fc04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC04 10380 bytes
SHA-256: b6f695f2742392c4d6d608144ace6765363506b1be55f8cb5b94ae281ea5e58d

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