Malicious PDF — malware analysis report

Static analysis result for SHA-256 a44046279d9db722…

MALICIOUS

PDF

81.0 KB Created: 2021-03-21 02:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 9f41178b8589033b636c9e553ab17f1e SHA-1: 5612a2af96c99acb24312da55fec9425b8ff12e5 SHA-256: a44046279d9db7229dc4b73f14058644cb11e8c496a2aebf9e5b8f7a20f266c1
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of external URIs and the overall structure strongly suggest this document is part of a phishing or malware distribution campaign, likely initiated via spearphishing.

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://vilenefex.ru/wix?keyword=brstm+to+nus3bank PDF link annotation
    • http://snapchat-alert.com/gejewizekn2xrr.pdfIn PDF document text
    • http://jojidasusesot.sportsontheweb.net/adobe_reader_offline_installer.pdfIn PDF document text
    • http://grampus-shop.com/tuvuxixowawayi8.pdfIn PDF document text
    • http://flowerport.shop/pelicula_del_nio_que_se_cae_en_el_hielo4t2f2.pdfIn PDF document text
    • http://kemytbok.xyz/biblia_peshitta_enx9jjd.pdfIn PDF document text
    • http://sdek-24.cc/the_family_man_full_movie_moviescounter2xq31.pdfIn PDF document text
    • http://indonesia2health.online/ihome_bluetooth_keyboard_for_ipad73qr6.pdfIn PDF document text
    • http://drive4mclaneaustell.com/imperialism_in_latin_america_worksheetoaeen.pdfIn PDF document text
    • http://peludofnor.fun/riwodiposuwerld50k.pdfIn PDF document text
    • http://wumewil.sportsontheweb.net/cambridge_english_test_b1.pdfIn PDF document text
    • http://nosinoski.shop/math_worksheets_for_grade_6e3mpi.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/how_did_the_methods_and_subjects_in_art_change_during_the_renaissance.pdfIn PDF document text
    • http://hookup157.online/dukotavk2b8o.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeform.com/99605714372hhdex.pdfIn PDF document text
    • http://glasshookahcatering.com/senosizemanedumezatp857.pdfIn PDF document text
    • http://health2health.online/french_subjunctive_irregular_verbs_list2nxq0.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/something_anything_nothing_exercises.pdfIn PDF document text
    • http://ezfix.asia/40473842037q9zd7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vibirokudod.myartsonline.com/71428531734.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab31b5e-6684-49ed-8571-6cc66515c879/pibeludejuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/683a8a5a-a978-475d-bc4d-1f64c220cd9c/48800610298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9971a95b-814c-4910-a4e2-48136348bb6c/41258878559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ada64823-a1ba-4fe9-94ea-fa7e1a865afb/garmin_zumo_660_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d090ddb6-5d3d-4246-ad89-76088349ab83/sub_zero_freezer_not_staying_cold.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_off00010013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10013 5216 bytes
SHA-256: 629c55db277f8de0d0efa0c7f841d243a7843a5d67e236a8871810835189efa4
font_01_sfnt_off000111bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111BD 10912 bytes
SHA-256: f7f4c4afac837242d96673cabf44672823b2c8b70e1f59c247951adbe8ca58ec

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