Malicious PDF — malware analysis report

Static analysis result for SHA-256 33add42b2d5cf519…

MALICIOUS

PDF

78.0 KB Created: 2021-02-26 01:16:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 42ac2477f4e848799f898a5e54645e09 SHA-1: bcee223eb1bb89d39b0b90674d0c3a3234fea8b7 SHA-256: 33add42b2d5cf5199b9c8b15c3cf8fae3388ada0bfd318e0b4a48d5817515cb5
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://maypoin.ru/aws?utm_term=escuela+de+wurzburgo+psicolog%25C3%25ADa+resumen PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470537/normal_5fce0b472f82c.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/hjhUXeg/46895889735.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/ilhihfl/13394080597.pdfIn PDF document text
    • https://felavutiz.weebly.com/uploads/1/3/1/1/131164211/4f48cae3.pdfIn PDF document text
    • http://steblin.pro/robikikejigisubavunll88.pdfIn PDF document text
    • http://shoop-fm.ru/how_to_find_a_lawyer_to_review_a_contract4afrm.pdfIn PDF document text
    • http://shoppingyxplus.xyz/1401257831917eek.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381531/normal_5feba089da455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wuduzukatej.epizy.com/on_the_road_again_animated_movie.pdfIn PDF document text
    • http://dipimov.epizy.com/folaverexonupejuzavozupub.pdfIn PDF document text
    • http://kemixirutuj.epizy.com/angular_material_group_form_fields.pdfIn PDF document text
    • http://pivujumurabaf.epizy.com/dieta_pobre_en_purinas.pdfIn PDF document text
    • http://vetuvawefaxuta.rf.gd/67092348200.pdfIn PDF document text
    • http://fepapagibonu.rf.gd/98799769446.pdfIn PDF document text
    • http://sujutesar.rf.gd/automatic_call_recorder_pro_apk_uptodown.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_off0000ee0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0D 5684 bytes
SHA-256: 8adb7db75aa5fab630ab1fdd39246dda1024dc296ead8b54fb5e631f830c2f8b
font_01_sfnt_off0001016f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1016F 12080 bytes
SHA-256: 27a92a6aff05939b98bfa021de02589133d452887de18220a1771a7924272e0b