Malicious PDF — malware analysis report

Static analysis result for SHA-256 03a4454bcde14f4f…

MALICIOUS

PDF

74.1 KB Created: 2021-06-09 19:34:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dee3d23559106a97b8dc19b2ae8cabbc SHA-1: aa93cbc17ee4da64c9b3890f910287023bc80c79 SHA-256: 03a4454bcde14f4fb6e3c96789bdeeda34ff0facf8701ac0e5d2d0ab551ca4f8
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary malicious URL identified as https://allytemp.ru/pbw?utm_term=mortal+engines+book+pdf. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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 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://allytemp.ru/pbw?utm_term=mortal+engines+book+pdf PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4414358/normal_60b4348a4242c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487623/normal_5ff340853de23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407327/normal_60bbde9f24d29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410988/normal_60055c72678d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_60158743a1202.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419626/normal_5fc7d14778acd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_6047ed664c991.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144415128/how_to_run_originality_report_in_google_classroom_as_a_teacher.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/w/file/fetch/144566217/caveat_application_format_in_marathi.pdfIn PDF document text
    • http://supatibu.pbworks.com/f/short_stories_based_on_thirukkural_in_tamil.pdfIn PDF document text
    • http://gokewisu.pbworks.com/f/49625016641.pdfIn PDF document text
    • http://tovovojufa.pbworks.com/w/file/fetch/144669783/human_physiology_from_cells_to_systems_oleh_lauralee_sherwood_8th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96e98fe7-8af5-4eee-9f40-dc6a334217e2/gerisokerodu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f95fac8-b0bb-4161-9e33-c7a3898b5603/project_scope_statement_pmi_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/125f09ac-cf7e-4169-9813-2742af421e6f/nuzezaxopuze.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/how_old_is_samsung_galaxy_grand_prime.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba0a4435-5898-49e6-9920-5605691e1d0c/bissell_turboclean_powerbrush_pet_carpet_cleaner_2085_reviews.pdfIn PDF document text
    • http://wasazejis.pbworks.com/w/file/fetch/144944688/find_equation_of_exponential_function_given_two_points.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/527b9275-7115-4c2d-add1-e4221f2583ad/strategic_relocation_book_4th_edition.pdfIn PDF document text
    • http://demopefo.pbworks.com/f/zopik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fc983fe-45ce-41c9-af38-a9cd21c0a621/sage_chg_bath_wipes_instructions.pdfIn PDF document text
    • http://kunixove.pbworks.com/w/file/fetch/144919845/indian_full_movies_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/566d5a2d-89e9-4c8c-bba2-db724314f411/kimidipixekexefa.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_off0000e001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE001 5420 bytes
SHA-256: 9e943bcf580855f2fc5aef34017f37074ddda110043d09515c8564a39773da23
font_01_sfnt_off0000f281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF281 12128 bytes
SHA-256: 38ccd5e000405280b973199ed701a5479d482ee30b669336e3ad63d690fe613f