Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dda89f4469f7208…

MALICIOUS

PDF

69.2 KB Created: 2021-02-19 08:41:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 5db600e94540fc771ac40bce3db070bb SHA-1: ae5ecc5c79af067d7402d23da4190e09dfd6f146 SHA-256: 7dda89f4469f72083f91165ac04e2e9717ec77f7baf233d5ed9c6b30682096a1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/wb?keyword=how%20to%20reduce%20medical%20errors%20in%20healthcare In PDF document text
    • http://stylecurtains.com/mosuxudwzx0.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/agdjbHr/xorobedinelu.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/i0qGmjj/18290192753.pdfIn PDF document text
    • https://zokibiruxe.weebly.com/uploads/1/3/5/3/135326092/6128647.pdfIn PDF document text
    • http://fredo.run/75288633712u38gs.pdfIn PDF document text
    • https://giderolimarova.weebly.com/uploads/1/3/4/0/134098849/918806.pdfIn PDF document text
    • http://akfb.online/xirobodawaveji2dtgj.pdfIn PDF document text
    • https://cdn.sqhk.co/jovuvufoxet/WNgdijl/18751192859.pdfIn PDF document text
    • https://cdn.sqhk.co/miraroki/NkRD7je/coarse_fishing_hook_sizes_chart.pdfIn PDF document text
    • https://veretiwuwe.weebly.com/uploads/1/3/1/4/131406621/fobapikok.pdfIn PDF document text
    • https://japiravonasuv.weebly.com/uploads/1/3/4/6/134644749/72a232.pdfIn PDF document text
    • https://cdn.sqhk.co/terisuzuji/gDggU6M/bubble_pets_discount_code.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/sumesawoxajew/woxinagab.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/wordpress_free_blog_templates_responsive.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/performance_appraisal_comments_productivity_of_work.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_off0000d2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F0 5232 bytes
SHA-256: ce6cef4969829217282e17d0b7868fa6d75210054bc6a4f23824404c9b1f457c
font_01_sfnt_off0000e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE497 10524 bytes
SHA-256: 300bebd90368fb49105df89fbdff1826b0db5bcdb18678296c599bed5bafd3ec