Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcdcdb7f00264d8…

MALICIOUS

PDF

78.5 KB Created: 2021-02-05 23:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: eb6c7bbb15aa04d37a6a3268a4c91a03 SHA-1: 9c171f2f93f959d1fe2c2c9b5ed3c4fa21961654 SHA-256: 7dcdcdb7f00264d85159094b5ba5175a270fcd378fd9ad92178c46d4a92b0601
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://baarspo.ru/wb?keyword=kbc%20gbjj%20today%20question%20answer PDF link annotation
    • https://kosukanawator.weebly.com/uploads/1/3/5/3/135304621/rozeroda_jizeloretusome.pdfIn PDF document text
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/a697de9eb2aa57.pdfIn PDF document text
    • http://gewebud.22web.org/volume_of_cube_and_cuboid_worksheet.pdfIn PDF document text
    • https://dapasubasawesol.weebly.com/uploads/1/3/4/3/134383907/zeremej.pdfIn PDF document text
    • http://zodazaze.22web.org/android_tv_box_vs_smart_tv.pdfIn PDF document text
    • https://rejomopoxe.weebly.com/uploads/1/3/1/3/131383333/boduxedobixenuvam.pdfIn PDF document text
    • https://viwezoluzuwa.weebly.com/uploads/1/3/4/4/134401695/fugur.pdfIn PDF document text
    • https://nefosedinipal.weebly.com/uploads/1/3/4/6/134698739/dipalila.pdfIn PDF document text
    • http://kibipasadas.iblogger.org/banjaran_ka_gana.pdfIn PDF document text
    • http://naziniza.22web.org/casio_graph_90_e_calcul_formel.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/gazitif/computer_full_form_list.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/70188653975.pdfIn PDF document text
    • http://xezerubewuxa.epizy.com/41119179827.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/ropowopazevosifuwakakaz.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/aventail_linux_client.pdfIn PDF document text
    • http://pugagewuda.rf.gd/asuran_bgm_ringtone_zedge.pdfIn PDF document text
    • http://puzasapexuwuju.epizy.com/astrology_answers_adrian_duncan_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/nisasumiguj.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_off0000f56e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56E 5580 bytes
SHA-256: bfce8ad6e951314dd0993473c32c83e7eeb5a9557f853fdc6aa55edc691ac92b
font_01_sfnt_off0001088a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088A 10724 bytes
SHA-256: eea13860a2418de9f27938510334da0c1ed94e720f2b6fc732399dd0616364d0