Malicious PDF — malware analysis report

Static analysis result for SHA-256 110c65ecef511d59…

MALICIOUS

PDF

70.8 KB Created: 2021-02-12 08:03:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1a1c01f0588f90c9475293055f6fe3e4 SHA-1: 3d96209782b0696aa2eb4f0cce7763d6b3a5807e SHA-256: 110c65ecef511d59f35839a0f2e0a92a4e5a9531124e87b6f35614d45412d255
136 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
  • 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.
  • 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://baarspo.ru/wix?keyword=estimating+square+root+worksheets+8th+grade PDF link annotation
    • http://design-kvartira.info/637978523206nz5r.pdfIn PDF document text
    • http://avto-trokot.xyz/357933736906vrit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5fd9361a3d532.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417045/normal_6008c5b7d74d2.pdfIn PDF document text
    • http://xxlmature.site/plug_dj_bot_commands90gyt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5fe5ed129241c.pdfIn PDF document text
    • http://olipaka.xyz/dbrau_semester_exam_date_sheet_20185xxt4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391909/normal_5fc73f8a05d12.pdfIn PDF document text
    • http://wegansit.space/poached_eggs_vinegarmo038.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456667/normal_60044d152f96a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443325/normal_5ff50a2a8b057.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495399/normal_6018b7b949948.pdfIn PDF document text
    • http://robot3.site/outline_practice_worksheet_middle_school5j5ng.pdfIn PDF document text
    • http://vowogibex.22web.org/ziperudup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461204/normal_5fcc41e548f74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wafuzujutine.rf.gd/interchange_1_fourth_edition_workbook_answers.pdfIn PDF document text
    • http://xujekapowizi.epizy.com/voridowabavarukivopidu.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/95667837696.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_off0000d5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C7 5640 bytes
SHA-256: e0f23fee9584d5f443b810f4ee74873badb1860c62b337f1a07073d5e023146d
font_01_sfnt_off0000e8d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D7 10700 bytes
SHA-256: 544fc2b980108f937fc71f14fc61f98afe6945fd35c737e68d1b82d94d2b56c2