Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc01ebca20c738a…

MALICIOUS

PDF

79.1 KB Created: 2021-02-23 04:08:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3af33941fe2940c4c0c0f41cb80acfa4 SHA-1: 94a8cd631844e086b09063c1f23efaf55f7a8a04 SHA-256: fdc01ebca20c738ac715c7a6cf73356de1c1ce2cdbab809d1d9b5ede79af211f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which point to suspicious domains and are likely part of a link farm designed to distribute malware or facilitate phishing. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. The embedded URLs and the document's apparent purpose of luring users with financial trading content support a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://bologen.ru/strik?utm_term=learn+how+to+trade+forex+pdf+download PDF link annotation
    • http://sexesex.site/57099714274oju3q.pdfIn PDF document text
    • http://vekvelo.ru/cursos_de_negocios_internacionales_por_internet_gratis2h63n.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/iNr7Rhh/project_management_certification_free.pdfIn PDF document text
    • https://zajoralesame.weebly.com/uploads/1/3/0/9/130969459/507164.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/5heKlgS/71912435998.pdfIn PDF document text
    • http://petrol-v-pol-price.site/bobcat_2200_service_repair_manualkmo98.pdfIn PDF document text
    • https://cdn.sqhk.co/rotexopapi/DJKhjhj/43639817713.pdfIn PDF document text
    • http://pshcomonhere.xyz/sat_chemistry_answer_sheet9lwdt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pukaridimupo/dem_buon_tinh_le_music_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/42497595001.pdfIn PDF document text
    • https://s3.amazonaws.com/wujanozo/southern_charm_charleston_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jupudizadid/feedback_form_template_for_teaching.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/abbaigaru_songs_naa_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/kudare.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/how_to_file_form_mcs-150.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/63119274125.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/addictive_android_games_apps.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/remavizifufudirusivowim.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/how_to_develop_conflict_management_skills.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB34 4792 bytes
SHA-256: f5c0b611bfcef05bdb29e45d7ae6be0d90a7ba1f1c1613ee83af3c2c9d1204d1
font_01_sfnt_off0000fb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB89 10988 bytes
SHA-256: 124b6a6a354f847fdb55c2b6b21edc1cbf8ca43b843a80475ef5e577194d823b
font_02_sfnt_off0001210c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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