Malicious PDF — malware analysis report

Static analysis result for SHA-256 31de538d17d4e4a7…

MALICIOUS

PDF

76.1 KB Created: 2021-02-14 08:18:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 07464c9d52f7b85b23634efc27764da9 SHA-1: aaa8aafdfc8b977f3c7a0a14c3ddbb9458768892 SHA-256: 31de538d17d4e4a7f191146a6d03cf12baf8d75ae0996e2a94dcb8aea96c8a3c
126 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
  • 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/123?utm_term=dewalt+3800+psi+pressure+washer+pump PDF link annotation
    • http://smeh-mif.space/ravefivudedofotovuzip9d88h.pdfIn PDF document text
    • https://gafabudadu.weebly.com/uploads/1/3/1/3/131384489/9545183.pdfIn PDF document text
    • http://naturmilans.fun/nivunewevixam6xecd.pdfIn PDF document text
    • http://blancop.xyz/5214374802ftxgb.pdfIn PDF document text
    • https://tubekari.weebly.com/uploads/1/3/1/6/131636965/jinibosovupiki.pdfIn PDF document text
    • http://starkrobotics.org/sutubuxukuwog8y3r.pdfIn PDF document text
    • http://itfamily.pro/akiba_s_trip_festa_apkwb516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393647/normal_601e3424a48dc.pdfIn PDF document text
    • http://nigasheff.xyz/rimusuxozu9rbm4.pdfIn PDF document text
    • https://xomowozijirogap.weebly.com/uploads/1/3/4/6/134667332/a294d2ee.pdfIn PDF document text
    • http://opensol.xyz/84434100561lpa72.pdfIn PDF document text
    • http://vitalia-transports.com/nakawenizegeperovaty49.pdfIn PDF document text
    • http://opssmall.space/photo_id_card_template_free_online6lnxr.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/gifiz/kugekaxunutexapefudokus.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/zukiduvifotaxukex.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_off0000ea73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA73 5648 bytes
SHA-256: f3f68cc87846590519110a5d1fd3ca4e11a40eea3634457dd73c6f7cd2ff88b1
font_01_sfnt_off0000fd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9A 11260 bytes
SHA-256: 898562aa564951ead331a9ab66c89ab58c4d7a657534a942902dcce2023422d9