Malicious PDF — malware analysis report

Static analysis result for SHA-256 94dd73e7762d5155…

MALICIOUS

PDF

116.8 KB Created: 2021-03-06 06:45:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ef02414ac6c5625a1ba92fe6dce8d980 SHA-1: 2eb77f4860d981ded1c3021b162e2a10ec75e629 SHA-256: 94dd73e7762d5155d4d321721c1cf79ff9000e681587c928737cb990cedfed12
186 Risk Score

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 0.9995

Heuristics 6

  • 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 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://xajibur.ru/wix?keyword=wheel+of+fortune+movie+title+5+words PDF link annotation
    • https://cdn.sqhk.co/temejikowewa/QHBgcgh/lidezigidegavubinesaki.pdfIn PDF document text
    • https://cdn.sqhk.co/viwedanej/FRIgdhj/hungry_shark_world_all_sharks_in_real_life.pdfIn PDF document text
    • https://cdn.sqhk.co/vadetegubufo/QVB0idQ/skin_editor_tool_for_minecraft_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/ihv1Th1/10887819283.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/gQijnjg/furniture_steam_cleaner_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/temetixufuxi/heBl9rQ/didagaleto.pdfIn PDF document text
    • http://sudenusona.66ghz.com/aaa_logo_icons.pdfIn PDF document text
    • https://cdn.sqhk.co/semegopo/hgfIigP/margherita_pizza_ingredients_pizza_hut.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/cNWphfT/99176213201.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/97728979668.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/wixuderizoxaluzi.pdfIn PDF document text
    • http://pipinodojo.epizy.com/app_store_logo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96fd2121-952a-4268-96c0-227f1eedcdd8/dorothy_must_die_series_wiki.pdfIn PDF document text
    • https://2559d30b-64cd-4b4d-aaad-e76a675dde99.filesusr.com/ugd/f5a024_14080717a63e4289857c31298b8bd0a9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5503038f-8303-4fd2-86c5-17c207134ea7/joxewekamowegibanu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55421c19-5e1b-4697-ba1f-5ee1ab77bbb3/zumelawogidetubewaso.pdfIn PDF document text
    • https://5c1f1dc6-d8dc-4ed9-951d-9a6050f495db.filesusr.com/ugd/b972d5_77f56192d4bc4e85a8783bcee7085c6a.pdf?index=trueIn PDF document text
    • http://moniladipawi.epizy.com/chemistry_chapter_2_test_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/xoguxonex.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_9d8bffc1d2d94001bc6af6b8e32d1e75.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5da3570-a771-44a3-86c4-2e32b32fe64d/11506548775.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/73650271295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfdeaa2f-aa7f-469f-a496-080efae15c6b/temple_of_seti_i_at_abydos_egypt.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_off00017d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D7E 5228 bytes
SHA-256: 1e30a543634263e0b2a262c8126436c1b18d2431aef09c0b03d30102d3b8319a
font_01_sfnt_off00018f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F41 16984 bytes
SHA-256: e63d3299ef36691d07ae062ccd87bd9cfb693616a67432626cee3e0ce83308f2