Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeea54dfc52f6b63…

MALICIOUS

PDF

73.2 KB Created: 2021-05-18 09:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54db86da436ee184b2582ff0a6f08a7c SHA-1: ed885b829ccce8d938de03d5291a813c3f6a42f3 SHA-256: eeea54dfc52f6b63f134805530275327703d72a6110c56acc8d068d0931eef3a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of external links, many of which are to benign resources, but one critical heuristic identified it as a PDF link farm. The primary malicious URL points to a domain associated with phishing and malware distribution. While no scripts were directly extracted, the PDF structure and the presence of external links suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/strik?utm_term=dicionario+de+acordes+para+guitarra+pdf+download
    • https://wuwenesugujiku.weebly.com/uploads/1/3/0/7/130739695/101020.pdf
    • https://zokemubolito.weebly.com/uploads/1/3/4/8/134895641/4752ba.pdf
    • https://vakurizilobiwil.weebly.com/uploads/1/3/0/9/130969742/darefelevefisoxag.pdf
    • https://fexifeter.weebly.com/uploads/1/3/4/6/134612515/2068057.pdf
    • https://cdn-cms.f-static.net/uploads/4475720/normal_606e649592359.pdf
    • https://mokitigek.weebly.com/uploads/1/3/1/6/131606839/fezokexef.pdf
    • https://kepubaxolawava.weebly.com/uploads/1/3/4/7/134703856/medij-sovaluf-vabuk-xurunobajenug.pdf
    • https://static.s123-cdn-static.com/uploads/4449187/normal_6009909e7a96a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/18ebc465-82e1-45d0-8e68-064725f414f8/how_to_begin_a_paragraph_in_latex.pdf
    • https://s3.amazonaws.com/gezetega/92524733622.pdf
    • https://s3.amazonaws.com/tixeligufokup/chevrolet_trailblazer_2002_owners_manual.pdf
    • https://s3.amazonaws.com/xakajoziwibi/cuantos_medios_de_comunicacion_existen_en_la_actualidad.pdf
    • https://s3.amazonaws.com/kikunojulejuj/3d_animation_movies_software_free.pdf
    • https://s3.amazonaws.com/zalisujezajaje/a_small______triangle_appears_in_the_upper-right_corner_of_a_cell_containing_a_comment.pdf
    • https://uploads.strikinglycdn.com/files/819d3976-3283-448f-839d-d105cf305bae/monsters_inc_meme_mike_explaining.pdf
    • https://s3.amazonaws.com/vazisi/78961965677.pdf
    • https://uploads.strikinglycdn.com/files/52d66804-e17b-40fd-b6f9-06d04232b9f5/68646501774.pdf
    • https://uploads.strikinglycdn.com/files/e2b81b33-ca76-4c7c-8826-27ccf57f7a74/financial_accounting_tools_for_business_decision_making_9th_edition_by_kimmel_weygandt_and_kieso.pdf
    • https://s3.amazonaws.com/muvazi/how_to_update_my_bios_american_megatrends.pdf
    • https://s3.amazonaws.com/kigavanus/south_movie_mp4_video.pdf
    • https://s3.amazonaws.com/widiku/carprog_v9._31.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db72.bin
7226263db81cb3cb9a6565558aaed8d487ec97b8e11dda81f6dccf4ed7d4bc4b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDB72 5416 bytes
font_01_sfnt_off0000ee09.bin
7478549393375fd7ed431eb9cacb7bd8eab53891b3c0186d8b3020246cedcaa2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 12740 bytes