Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72d9923f5250878…

MALICIOUS

PDF

75.1 KB Created: 2021-02-27 11:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: e3a6d20750a71ebe9fdd05de3e97fb0b SHA-1: 716f4aa976be9ef8d30230eb5d364fea1dd62fef SHA-256: f72d9923f5250878550d824d24b7f2721fdf8b89d6caa174fb4148b3cc0d6706
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://zajinet.ru/123?utm_term=what+is+48+laws+of+power PDF link annotation
    • http://gifinibufenatar.medianewsonline.com/zojononukawosi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462038/normal_5fd34e4f84647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479942/normal_6039f9d59e00d.pdfIn PDF document text
    • http://lamejix.scienceontheweb.net/soxanoronukazopejupomorok.pdfIn PDF document text
    • https://lokejefu.weebly.com/uploads/1/3/5/3/135301848/9175665.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/19677936697.pdfIn PDF document text
    • https://sikediluselifa.weebly.com/uploads/1/3/1/6/131636826/degivura-vipezikobiviko.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/lefevexipojazojo.pdfIn PDF document text
    • https://popupobapovuzus.weebly.com/uploads/1/3/4/0/134012290/3b523653e.pdfIn PDF document text
    • https://zafudibibini.weebly.com/uploads/1/3/4/1/134108698/114455.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sanagubilisefuw.rf.gd/addition_and_subtraction_of_radicals_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/excerpt_from_blue_jasmine_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/17046021085.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/application_form_for_indian_passport_online.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/99462255296.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_off0000e908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE908 5376 bytes
SHA-256: e731e6c224e7041a66e59a03fef93efcdddfc2442bdd65ed8d28c05d21977d07
font_01_sfnt_off0000fb6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6E 10624 bytes
SHA-256: 53c1f4fc3fbfbc9e05dc8495791d17a656d86f6d303ea2f512a13095239e9477