Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f426fb7cd037194…

MALICIOUS

PDF

76.9 KB Created: 2021-04-15 06:50:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ef33b3516f6cd9ae5f73e73f1e686b86 SHA-1: bf49b400966e0984f6ce8b73864a20f17b7b4316 SHA-256: 8f426fb7cd0371941ea068d63de8cdb6442a8fe9cb3331b060257b8d5e475844
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The embedded URLs, particularly 'https://resalured.ru/strik?utm_term=pride+and+prejudice+2005+watch+online+free+123', suggest a lure to a malicious site disguised as a movie streaming link. The PDF's structure and content, despite being heavily obfuscated, align with common tactics for delivering malicious payloads or redirecting users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=pride+and+prejudice+2005+watch+online+free+123 PDF link annotation
    • https://cdn.sqhk.co/kutupejotige/chh0idF/make_sentence_with_word_gamers.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/jg4gc2L/33794179039.pdfIn PDF document text
    • https://cdn.sqhk.co/vujaderaz/qvidggH/how_to_get_likes_on_facebook_post_fast.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/8gfifhd/50326054985.pdfIn PDF document text
    • http://fexuvukenix.22web.org/casio_g_shock_5229_ga_200_manual.pdfIn PDF document text
    • http://nibusunulov.22web.org/when_to_capitalize_job_titles.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/XVJijRO/eat_it_all_comes_out.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4647adb0-9c01-46a1-aef1-4380d5873f13.filesusr.com/ugd/edb4a7_54e09f05acdf4f21b255c8a6618646fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fadedosi/nokenobobisurelo.pdfIn PDF document text
    • http://fafiwokewe.epizy.com/81742689886.pdfIn PDF document text
    • http://lamumabazekutum.epizy.com/70487491949.pdfIn PDF document text
    • http://kegepedefaripi.epizy.com/best_adrenaline_rush_games_android.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_b0692985d6e24944a45113b7c25acaf0.pdf?index=trueIn PDF document text
    • http://wivowutone.epizy.com/ashampoo_free_2._0._2.pdfIn PDF document text
    • https://0d801636-e20c-47cf-9654-f2c4f0d28fb9.filesusr.com/ugd/2e7c9c_5a3b84b83dce43f39c7ee13b9a32eeb1.pdf?index=trueIn PDF document text
    • http://wewojujimijanu.rf.gd/free_printable_worksheet_prepositions_of_place.pdfIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_16ba9e2516e445fba128524e9033b248.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7f9546-d628-4fd9-976a-88e1ebf5d610/prince_charles_net_worth_2019_forbes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fbc1906-fa2c-4bd6-8b85-4c558f522bdb/how_to_renew_your_permit_in_south_carolina.pdfIn PDF document text
    • http://mugusamela.rf.gd/gamufemitadiviga.pdfIn PDF document text
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_dda637cc4e6e4adb9c8d03ec9c31fd98.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/11438146664.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/computer_service_repair_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3bb6b2-f6f4-4000-913c-4a1bb1c2b8c2/sufitusuvulemu.pdfIn PDF document text
    • http://buxebawimiro.epizy.com/wanunujovetadofetinojuxo.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_off0000eb0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0F 5848 bytes
SHA-256: 573b515db6f21ed54b2adfda9aa5bd15cfe0881a708ec112b7563ac82be77ee1
font_01_sfnt_off0000ff20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF20 11540 bytes
SHA-256: 05bbe3b1c0c1091b027e4c88a1621b87a24a47dd17cf0eea0e890881630f8e97