Malicious PDF — malware analysis report

Static analysis result for SHA-256 1015e8f34e1276fe…

MALICIOUS

PDF

69.1 KB Created: 2021-06-05 19:59:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9bc8e7b56a6c15ed930c6fa7e89eacf5 SHA-1: deffaa5a7b318f62f5a365f4c2171a586797c80d SHA-256: 1015e8f34e1276fe284452d8dd1c5f4d567b2078584a39946e324e33d182e0ca
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://chcial.ru/pbw?utm_term=bahubali+2+tamil+songs+mp3+free+download+kuttyweb PDF link annotation
    • https://dalovoxibezovuk.weebly.com/uploads/1/3/4/6/134615649/rijeben.pdfIn PDF document text
    • https://lanowixel.weebly.com/uploads/1/3/4/8/134862970/d4f1f97de004b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424982/normal_601c86c52365d.pdfIn PDF document text
    • https://mobojifukan.weebly.com/uploads/1/3/4/6/134688158/jamewokusaju-wosexomowu-sopebumax-venazudutuka.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478683/normal_600283741fb6c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413227/normal_60044c3be283e.pdfIn PDF document text
    • https://xesofizagib.weebly.com/uploads/1/3/4/4/134491847/febidibutado.pdfIn PDF document text
    • https://wijirejilape.weebly.com/uploads/1/3/2/8/132816202/tumikujeve_wosufexuxunojo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496013/normal_60047581273a6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://molitutolu.pbworks.com/f/35306676078.pdfIn PDF document text
    • http://jebodigezev.pbworks.com/f/things_fall_apart_important_quotes.pdfIn PDF document text
    • http://kapetipubi.pbworks.com/w/file/fetch/144649920/25866968211.pdfIn PDF document text
    • http://volikedejefa.pbworks.com/f/glwiz_tv_app_free_download.pdfIn PDF document text
    • http://siwuromo.pbworks.com/f/where_do_i_report_1099-oid_box_1.pdfIn PDF document text
    • http://mazibudikor.pbworks.com/f/jadomurutorimowunubexu.pdfIn PDF document text
    • http://vulazojab.pbworks.com/w/file/fetch/144612156/tawivubi.pdfIn PDF document text
    • http://dibesusajob.pbworks.com/f/significant_figures_practice_problems_with_answers.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/pudivi.pdfIn PDF document text
    • http://nukuxim.pbworks.com/w/file/fetch/144508782/96537074905.pdfIn PDF document text
    • http://polubisoxuwo.pbworks.com/w/file/fetch/144663147/bonimes.pdfIn PDF document text
    • http://jebusolole.pbworks.com/f/descargar_abbyy_finereader_15_full_espaol_gratis_con_crack.pdfIn PDF document text
    • http://munonoraze.pbworks.com/w/file/fetch/144445095/43324306720.pdfIn PDF document text
    • http://vifogajo.pbworks.com/f/foundations_of_psychiatric_mental_health_nursing_study_guide.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_off0000d039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD039 6200 bytes
SHA-256: 13073726ebc42fb5695bab5de84139f01f60597d5d6bf308d86cb59956e51c8a
font_01_sfnt_off0000e53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53B 10124 bytes
SHA-256: 50fba6b5d4e3e1953532eea9cf8cbffe52735e6923a1f8d60aa71f1f6cc3180b