Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0832a21676ec6d…

MALICIOUS

PDF

75.8 KB Created: 2021-04-30 18:57:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 1c375d772eca5538837e30d8b2f62056 SHA-1: 9a5e6118826905d5ecc0e07b300396793f952a30 SHA-256: 0c0832a21676ec6dc3cedd3f48437a3e0370200d2a6156996a895161f81bfcf4
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'dafemum.ru'. ML classification and ClamAV also flagged this file as malicious. The embedded URL is likely intended to lure users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://dafemum.ru/strik?utm_term=moniciones+domingo+27+del+tiempo+ordinario+ciclo+c In PDF document text
    • https://cdn.sqhk.co/sufadoma/jcibohd/gadenavib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449603/normal_5fca21b2158ac.pdfIn PDF document text
    • http://dofoten.22web.org/80687560204.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/zhgVonK/engine_block_3d_model.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/jcTmhi6/free_games_casino_world.pdfIn PDF document text
    • https://xalitizamer.weebly.com/uploads/1/3/4/8/134863297/gaxuxigos_borejefezuwagos_kapubunomeg_fufuli.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/id1Id5P/drum_set_up_pictures.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460944/normal_5fe574ab37111.pdfIn PDF document text
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/rimuwizezopurus_gubudufogazo_redutitew.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/mufukep/fomijifa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da2a51b2-40d6-4e60-9d4a-1441f4d28518/yard_machine_lawn_mower_blade_bolt_size.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/chartered_financial_analyst_exam_pass_rates.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/technical_writing_skills.pdfIn PDF document text
    • http://gateguka.epizy.com/the_best_weather_radio_app_for_android.pdfIn PDF document text
    • http://vixodareva.epizy.com/67252582506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d2c064-423e-4377-a990-b451ed870a9f/heavenquest_a_pilgrims_progress_full_movie_download.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/gidufuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6480f7b-8466-486a-b61c-ac4db30096e7/84021853065.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_off0000e706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE706 5608 bytes
SHA-256: 0c64ad33bf73024da5fd2a53fba60d1a2e95f9b3c816fb097dcb6ef8dcd8768e
font_01_sfnt_off0000fa13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA13 11768 bytes
SHA-256: c6dc8f4cb0472f54bf2856b931b1bf17792169a6f7643208213b11557a1ea41c

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