Malicious PDF — malware analysis report

Static analysis result for SHA-256 7465b4d5fcac591b…

MALICIOUS

PDF

71.9 KB Created: 2021-01-22 15:27:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e5fcd7c1144a2b1272a138c7eff35f57 SHA-1: 90a034ebea30088e2345ae49aa2012ea9272d292 SHA-256: 7465b4d5fcac591b99bef206955619a77762e546ed89da904741d35595572eae
126 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
  • 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://druttle.ru/wb?keyword=sports%20car%20and%20bike%20hd%20wallpaper%20download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470035/normal_5fe66c257e0e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463809/normal_5fd3ab6d58ff0.pdfIn PDF document text
    • https://site-1211548.mozfiles.com/files/1211548/pugusunejevud.pdfIn PDF document text
    • https://site-1168233.mozfiles.com/files/1168233/vuremagis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382208/normal_5ff5e8f3e79c0.pdfIn PDF document text
    • https://site-1178289.mozfiles.com/files/1178289/53274390107.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490266/normal_5fe2a939ee05e.pdfIn PDF document text
    • https://site-1168441.mozfiles.com/files/1168441/sharpening_a_knife_using_a_steel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_5fd5f9f2c7d6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405660/normal_5fdc88da04df5.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/bejexe/52028260234.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/zetiginoliveluxil.pdfIn PDF document text
    • http://kenamumiv.rf.gd/50237235335.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/alamy_stock_photo_without_watermark.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/50034005311.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_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 5560 bytes
SHA-256: 2ba0aab578a193ad18f99af7264923e3e40d4625c7cee21109d130a7d19f59cb
font_01_sfnt_off0000ed51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED51 10948 bytes
SHA-256: 609bec0f3fe111ee8a6675888d12acd396e7ae515a9f6e8c8c594622b390eef9