Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39c2fbe81f24712…

MALICIOUS

PDF

74.7 KB Created: 2021-03-01 10:07:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 383baf9dff25182ffe1f5fb839802683 SHA-1: 80cb94490065ebcf181a0da46cbe3c8e8f07463c SHA-256: f39c2fbe81f24712859e801648b4216ea53eee133898cbf4e7fbfb8f3c565141
194 Risk Score

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/award?keyword=fitbit+versa+2+lite+waterproof In PDF document text
    • http://vuzetasavuxoso.mygamesonline.org/80537367758.pdfIn PDF document text
    • http://merulabodonulu.iblogger.org/62557944123.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/short_book_review_of_hamlet.pdfIn PDF document text
    • http://kuxidubavez.iblogger.org/pdf_to_jpg_converter_software_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/jadepibake/mAhh5LS/nagire.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/logic_pro_x_recommended_system_requirements.pdfIn PDF document text
    • http://woxuruko.medianewsonline.com/psion_handbook_3.5.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/zoromexemuzid/pisarofawap.pdfIn PDF document text
    • http://tubuzezaw.rf.gd/se_voc_no_sabe_onde_quer_ir_qualquer_caminho_serve.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/section_2_direction_and_location_answers.pdfIn PDF document text
    • http://magomodatibotu.epizy.com/42899054917.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/38937118004.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/knight_frank_hong_kong_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/servicenow_create_form_widget.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/tesco_directors_remuneration_report_2017.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_off0000e7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E3 5276 bytes
SHA-256: 848580c0218d7b9f65680cfd37b7195e97f3af348ccee166d75a3c66593c154c
font_01_sfnt_off0000f9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F6 10536 bytes
SHA-256: 392f540dc5dd7e19c5e37a8a8f2c11451cf2748aad3cb89a41f8d7f1c349bbcd