Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47a55111e14f6bf…

MALICIOUS

PDF

74.3 KB Created: 2021-02-28 14:37:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: bdcb0e200190ba505907b2da0fe5cf1f SHA-1: 91465235184fd94ba3d819930b0761277d8a2f84 SHA-256: b47a55111e14f6bffdd17399f558aa72e85ade23c94fffda67e4a75395f61cf6
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://resalured.ru/award?keyword=vector+battery+charger+700a PDF link annotation
    • https://cdn.sqhk.co/nisugavu/hatcidF/pasakujovupudasavubu.pdfIn PDF document text
    • https://tofujifudaxibav.weebly.com/uploads/1/3/5/3/135326414/betemibisedimab.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/xefevulevobakor.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/cjjlhbh/most_wanted_song_free_download.pdfIn PDF document text
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/415625.pdfIn PDF document text
    • http://robugipunebib.mygamesonline.org/81863257129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488569/normal_5fe79c41de42c.pdfIn PDF document text
    • https://gixunilaw.weebly.com/uploads/1/3/1/8/131856646/resefiwasuper-mikuno-zoxagikora.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/JprAhhf/archery_shooters_association_scores.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laganomezavarof.epizy.com/77968966738.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/the_logical_song_mindless_self_indulgence.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/vba_reference_cells_in_another_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/pavujiniz/billian_billian_akhan_free_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/entresto_patient_assistance.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/vefer.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_off0000e78e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE78E 5280 bytes
SHA-256: d763d1b201c2f4edad79691c8ecd518520777b6be4652f77d7cde14f8e76ebd9
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 10184 bytes
SHA-256: ec1ab743e22a611230098b520e452cee997632dc68713ef5a653983f50fad63e