Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb00f4579659e12…

MALICIOUS

PDF

81.5 KB Created: 2021-04-02 22:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 30e0f0331b22de054e007775ebf33cd3 SHA-1: 21bd5b2461daa1a04810a3017e8a998dcd87f3de SHA-256: 0eb00f4579659e12ac01e474bd725ff068394b3e1002570670b18a87c5e02684
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/strik?utm_term=take+five+dave+brubeck+piano+cover PDF link annotation
    • https://cdn.sqhk.co/rigizisojix/XScggVY/draw_rider_plus_mod_apk_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/ihgSDha/jozepikeb.pdfIn PDF document text
    • http://apeech.ru/how_to_setup_zebra_zp_5051aa2o.pdfIn PDF document text
    • https://fivitilanafime.weebly.com/uploads/1/3/5/3/135395402/tegirej-dumelazewem-kerusisa.pdfIn PDF document text
    • https://cdn.sqhk.co/luzeginu/wkBjjie/wazejiwivibadibaxusiban.pdfIn PDF document text
    • https://rokubupudila.weebly.com/uploads/1/3/1/8/131856034/83c65febb82728.pdfIn PDF document text
    • http://1freedom.space/sample_interview_questions_for_network_security_engineerlvipn.pdfIn PDF document text
    • https://lopomibuliwipa.weebly.com/uploads/1/3/1/3/131381919/632079.pdfIn PDF document text
    • https://vubenazago.weebly.com/uploads/1/3/4/3/134357699/rabopenegupi.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/dGiegd1/53786741887.pdfIn PDF document text
    • http://dkblogin-de.com/how_to_prep_for_sat_mathwoceo.pdfIn PDF document text
    • http://naykaryadom.fun/kaveraxuvolikekamalujaltjz.pdfIn PDF document text
    • https://cdn.sqhk.co/notigagamu/egdkzkl/clash_royale_hack_ios_download.pdfIn PDF document text
    • http://byseles.xyz/what_is_eating_behaviour7q4e7.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/ilahi_program_indir62j2z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_660a278e49a04b159be1eff80ae794de.pdf?index=trueIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_2209bdc0960e48889cc2d0ba67778df2.pdf?index=trueIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_8cf39ccb2086408db443497cfffb6b87.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b0c56e-46ea-4524-b0a2-2d855eaedcae/physics_multiple_choice_questions_and_answers_for_class_9.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bc361fb-3e8f-40b5-9a03-7c2f1a3d5212/dr_jekyll_and_mr_hyde_movie_2017_dvd.pdfIn PDF document text
    • https://da25564d-e3c2-4b9b-87ba-dd8ce2ae78d4.filesusr.com/ugd/c82cd6_d846d0a91bda4c3b952acfe9f6e1ca33.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/439645a4-3b1b-4751-97c7-7e6f40a542fd/atributos_de_dios_a_w_pink.pdfIn PDF document text
    • https://4b4b92a8-4ac5-4030-97d5-af0917f8c077.filesusr.com/ugd/0251f0_ce22b1cb2f2641029deaaf45c93442df.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_off000100c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 5152 bytes
SHA-256: 028b72759885c8e502adeb1502303f6143d0e6383b03bbfc831468169da7e475
font_01_sfnt_off00011269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11269 11608 bytes
SHA-256: ca6473b74c0343fc94bed9bcaa907e87127c7cec249110a9682a2fa4fbfb8c08