Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb87341300db085…

MALICIOUS

PDF

74.8 KB Created: 2021-04-07 09:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5d64f602a525bc6da576654b1abd78c1 SHA-1: 033b963a8e16463dd63d058659823d070d874f74 SHA-256: bdb87341300db085c01fe5a2a84a1490a929541d58742e4005f04280d645232f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the overall structure point towards a phishing lure, likely using a compromised or disposable hosting service to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jottigo.ru/strik?utm_term=tuv+rheinland+iso+9001+logo+vector PDF link annotation
    • http://xenakasewexibal.sportsontheweb.net/aaple_sarkar_registration_form.pdfIn PDF document text
    • https://boniwivo.weebly.com/uploads/1/3/2/6/132683051/pibujopuzasusubato.pdfIn PDF document text
    • http://changepass.online/moksha_en_el_hinduismoxccjv.pdfIn PDF document text
    • https://cdn.sqhk.co/pibepufas/hbeggha/paxamenewejobuk.pdfIn PDF document text
    • https://cdn.sqhk.co/jebumujo/QzjegIq/best_sculpture_parks_in_the_world.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/who_is_the_voice_of_bagheera_in_jungle_book0kzkl.pdfIn PDF document text
    • https://jixepelisu.weebly.com/uploads/1/3/2/6/132695865/rojizam.pdfIn PDF document text
    • http://posurazatux.mypressonline.com/support_vector_machine_python.pdfIn PDF document text
    • http://daimontimur.org/konosize9mlco.pdfIn PDF document text
    • https://cdn.sqhk.co/velujuvaxal/jGndfRU/pagozonov.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/biMjeUM/skins_for_roblox_girl.pdfIn PDF document text
    • http://idealica-uficiale.website/43906650016hrq0p.pdfIn PDF document text
    • https://tewagolefavir.weebly.com/uploads/1/3/0/8/130814187/3086096.pdfIn PDF document text
    • http://kakorezikudu.mypressonline.com/67644885299.pdfIn PDF document text
    • https://cdn.sqhk.co/satukevaguka/gigLzfy/28169099129.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/paropabaru/fopuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eee116d4-d776-4e8c-9bc2-566435bd84de/how_dangerous_is_steak_tartare.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/bajaj_allianz_health_insurance_policy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d1c31a-a67e-4391-8da2-9215ab25f620/vedofejoroga.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/powerpoint_project_management_dashboard_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43ee851-50ea-490f-9698-a3b3e8ba1a76/windows_10_pro_for_workstations_iso_download_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xowasosuf/sebawapujamutuxened.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6aca57af-9be6-4232-a558-28f0c1105a69/what_is_the_eligibility_criteria_for_bpsc.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_off0000e2b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B7 5560 bytes
SHA-256: 15cb64c84d87a570f3ccd08d0e0e706db782cf1777d6cc674fdbddcda77c8af0
font_01_sfnt_off0000f5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 11980 bytes
SHA-256: 6d1029198bc4b4e6c88fe265dbefa702c83a705050dfacb21b729baeb66ce85a

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