Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b26ae76b567ead8…

MALICIOUS

PDF

77.8 KB Created: 2021-03-19 05:43:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3be96baf8fc65f684a5b827316ae1ff0 SHA-1: 854a6f18f5007a66509dc046b3e850173e609f72 SHA-256: 5b26ae76b567ead8c7a831e068ebb6dce699b01b7416aec57476b9ca3666e913
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm on disposable hosting. It contains numerous embedded URLs pointing to various domains, many of which are unknown or potentially malicious, suggesting an attempt to redirect users to phishing or malware distribution sites. The presence of `utm_term` parameters in some URLs indicates a tracking or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://nipisod.ru/strik?utm_term=watch+dante%2527s+inferno+%25282007%2529+online+free PDF link annotation
    • http://setokanekema.mygamesonline.org/78635308964.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/xokokibogut.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/kudawowemozenofim.pdfIn PDF document text
    • http://sogixusi.medianewsonline.com/juzujakaritisananiwip.pdfIn PDF document text
    • http://vufajed.getenjoyment.net/introductory_functional_analysis_with_applications_erwin_kreyszig.pdfIn PDF document text
    • http://lotibamuzuti.scienceontheweb.net/how_fast_is_a_15_hp_outboard_motor.pdfIn PDF document text
    • http://xiwupulo.medianewsonline.com/el_budismo_historia.pdfIn PDF document text
    • http://christmas-gift.ru/8766328398507d4g.pdfIn PDF document text
    • http://copyright-help-report.com/how_to_assemble_a_total_gym_10004lk4q.pdfIn PDF document text
    • http://jofifuneku.medianewsonline.com/damiwaturikurekurowe.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/rejiner/west_bengal_election_2018_date_sheet.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/drum_brake_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/joreni.pdfIn PDF document text
    • http://vesikefu.rf.gd/samsung_ak59_manual.pdfIn PDF document text
    • http://bexovivuvere.myartsonline.com/nesaj.pdfIn PDF document text
    • http://bolatufor.epizy.com/gears_of_war_xbox_360_achievement_guide.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/litezoxejelimu.pdfIn PDF document text
    • http://sojusenetuki.onlinewebshop.net/variance_of_binomial_distribution.pdfIn PDF document text
    • http://raxajabidadida.onlinewebshop.net/zetenif.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/is_alone_on_netflix_good_for_hindi_movies.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwotarotavuz/buddha_and_his_dhamma_english_download.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/corporate_governance_guidelines_2012_in_bangladesh.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_off0000ee49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE49 5664 bytes
SHA-256: 302bacecc9ca0476eb7c7e59e432d9eba419f0aab85b87b6c0160d92c6ff053c
font_01_sfnt_off000101b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B3 11012 bytes
SHA-256: d0029af344ca7a3b374e36fec14bface1091bbbb2e7a1dc08a74c66d6cb4511b

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