Malicious PDF — malware analysis report

Static analysis result for SHA-256 793732eba530435c…

MALICIOUS

PDF

71.1 KB Created: 2021-02-05 05:59:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9c65b84f97cffc79c040d65e7735a17f SHA-1: 16e401d7aa6610a01e87f6cb0aa15c7b809fc34a SHA-256: 793732eba530435c8e558a8ea33885bbf62c09e1d9212b6fa337c68c10de8917
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/aws?utm_term=competitive+profile+matrix%2528+cpm+template In PDF document text
    • http://zewenidasi.iblogger.org/98734329038.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/topographic_map_quizt026o.pdfIn PDF document text
    • http://bcpzonasegur4viabcp.com/aqa_gcse_biology_kerboodle_answersxj5xh.pdfIn PDF document text
    • http://rakuxijewimafud.22web.org/baby_hospital_checklist.pdfIn PDF document text
    • http://aov.one/gravity_falls_piano_sheet_robloxdq36b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504922/normal_5ffe448adf092.pdfIn PDF document text
    • http://trenolgia.buzz/absolute_java_5th_edition_solutionsktomj.pdfIn PDF document text
    • http://legrand-spb.ru/308849686643y4fw.pdfIn PDF document text
    • http://help-verification.com/67156404355u5cx8.pdfIn PDF document text
    • http://leafester.online/kabeguim01o.pdfIn PDF document text
    • http://santand-es.com/mesuvupapejisaoqkxo.pdfIn PDF document text
    • https://nukarefu.weebly.com/uploads/1/3/4/1/134131348/9553655.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/pulujolatepuv/risk_management_principles_and_guidelines_iso_31000.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/15737180480.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/killer_attitude_status_image.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_off0000d98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98F 5092 bytes
SHA-256: 550376e1d46ed12998a41881de0c73ca0e2a796deb4da826e4706750d7c17cb4
font_01_sfnt_off0000eadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADD 10712 bytes
SHA-256: bbb4ee3c5490ccf8d0767dd782981ce4d0cf923df8198db925900b1fa10c70fa