Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec7d87751b3308b…

MALICIOUS

PDF

70.9 KB Created: 2021-03-15 01:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 2e57bcffdd84a40cbf82e14079127239 SHA-1: bffd9345203dd23588d8c0f5ae091a9a4036f42d SHA-256: 3ec7d87751b3308b7a739e4c13b1e63df61a697c65c88b36f209d95ff9dfc12e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains numerous external URIs, with a significant portion pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/wix?keyword=military+fleece+jacket+canada PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369334/normal_5fcd42e85994a.pdfIn PDF document text
    • http://xepuxesadara.mypressonline.com/darker_fifty_shades_darker_as_told_by_christian_free_book.pdfIn PDF document text
    • https://cdn.sqhk.co/tizudukokeni/qVibvje/music_video_editor_free_video_maker_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/cIiiIjg/air_control_heating_and_air_roswell_ga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_601b631290d50.pdfIn PDF document text
    • https://cdn.sqhk.co/suwajipox/jehfhbj/multithreading_interview_questions_java_advanced.pdfIn PDF document text
    • https://cdn.sqhk.co/livulopo/bdhjDjj/best_video_guide_gameplay_ink_tattoo_drawing_included.pdfIn PDF document text
    • https://cdn.sqhk.co/luvutagawata/aid5jiS/chip_and_dale_2_game_apk.pdfIn PDF document text
    • http://vitodibiwanezej.mypressonline.com/descargar_ana_gabriel_exitos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wiwosotu.myartsonline.com/boy_scouts_christmas_tree_lots.pdfIn PDF document text
    • https://fc06435f-e709-4c80-b59d-96fa470c1a13.filesusr.com/ugd/bdc04d_16c7d6c048b545678f50d108c90b7d76.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/franchising_vs_opening_your_own_business.pdfIn PDF document text
    • http://niwurekatexo.atwebpages.com/cantidad_de_liquido_amniotico_normal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0921d8f-1a19-4abf-beed-1cadaaa7aaa2/international_finance_graduate_jobs.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_3d7748056b474348b323b9802071084b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83284459-7c63-4b57-8f2f-56bb2d1ca566/festival_of_2021_year.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/how_do_i_program_my_liftmaster_remote_to_my_chamberlain_opener.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/758506e6-656e-469c-b109-b3390a8b36de/black_and_decker_20v_drill_driver_set.pdfIn PDF document text
    • https://s3.amazonaws.com/musoxifuvitalo/gilinuderupizoguziwofen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/382de2ca-13e2-4c00-a27d-0f4ead2bb407/simarixavivusunawotaj.pdfIn PDF document text
    • https://s3.amazonaws.com/retobifulipo/aps_march_meeting_2020_abstract_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/949501ab-909d-4b04-a36e-422a067c54ad/gozemaditilugub.pdfIn PDF document text
    • https://s3.amazonaws.com/sosupejuxofedo/vurujake.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_off0000d41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD41D 5084 bytes
SHA-256: a29caad972f7ffdb5b184f46f64efaa1e5efa02151a657bb2a463b27456efc5c
font_01_sfnt_off0000e596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE596 12988 bytes
SHA-256: 60a1127a7b32b93e1fc4142ea0c6577b7263cc2d259dfd3876e77c753a174108