Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd591298848c841…

MALICIOUS

PDF

96.1 KB Created: 2021-04-30 07:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c460df38095fde08047b7a9a6e72cdf4 SHA-1: d674437dfb21c6811793ba4fe25742dda2f3ca3c SHA-256: 3dd591298848c84142f531f490ee794df874f94f31778d22bf04a8dfeff3b103
186 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 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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/strik?utm_term=is+onn+walmart+brand PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4370087/normal_600306567348e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_602881e3d4b86.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_5fe8730d9b7a7.pdfIn PDF document text
    • https://cdn.sqhk.co/bepemuno/SgiMI98/pool_live_pro_8-_ball_9-_ball.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/WCichex/how_to_perform_descriptive_analysis_in_spss.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/idhgjhH/zewudijibe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370288/normal_5fdd289f09e15.pdfIn PDF document text
    • http://tidirakozodawon.getenjoyment.net/defiant_daylight_adjusting_indoor_digital_timer_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/biawjgf/supermarket_mania_journey_game_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/jgghjin/cars_movie_names_of_cars_pictures.pdfIn PDF document text
    • http://lozejokewoj.22web.org/setup_asus_dsl-ac68u_as_repeater.pdfIn PDF document text
    • http://viwoxufegoger.sportsontheweb.net/adenoiditis_aguda_y_cronica.pdfIn PDF document text
    • https://cdn.sqhk.co/fovomesit/jLWX2ss/1943337661.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_b75da1d58fdc4b9b92c63d6fd9c79973.pdf?index=trueIn PDF document text
    • http://teluroluxeterez.myartsonline.com/pudilulumogeza.pdfIn PDF document text
    • http://kujujigufa.epizy.com/32177714815.pdfIn PDF document text
    • http://fokezazonof.epizy.com/gulugefopuwudu.pdfIn PDF document text
    • http://buzumigasox.myartsonline.com/guzugemajumafaduroposoju.pdfIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_96e8307e31474eb982f49a7e3c44c24b.pdf?index=trueIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_ac26407a4b484c0c974bf5e5057457d3.pdf?index=trueIn 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_off000137f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F3 5140 bytes
SHA-256: 5082595fcee93d36db6b21379c0bbec80272d9c0d65927d32a244598b591d7f6
font_01_sfnt_off00014962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14962 12804 bytes
SHA-256: 5f0d27b4c73d492bc28d6547808925714e04434b7c4ee95fd5bfcf84b3614fc9

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