Malicious PDF — malware analysis report

Static analysis result for SHA-256 28b92e7957023ae0…

MALICIOUS

PDF

70.9 KB Created: 2021-02-24 09:23:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 10e0f1df392fdc2d2b95eae32a80420d SHA-1: b4fd66f2cbbba5380fa8dcda53e51ad0c761288c SHA-256: 28b92e7957023ae0fd939a2185c877362b6e172902ccaaf9f7c0c1b40dd4b70d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jottigo.ru/wix?keyword=mrs+piggle+wiggle%2527s+farm+pdf PDF link annotation
    • http://teenagetutor.online/mhw_all_campssdg80.pdfIn PDF document text
    • http://wenijivi.iblogger.org/jovoserele.pdfIn PDF document text
    • https://noxetetejiv.weebly.com/uploads/1/3/4/3/134391164/fuxogapusunukawu.pdfIn PDF document text
    • http://matcobzor.ru/rovasodpxha8.pdfIn PDF document text
    • http://myfirstsite.xyz/jvc_kds79bt_bluetooth_instructions0fh8t.pdfIn PDF document text
    • https://noxetetejiv.weebly.com/uploads/1/3/4/3/134391164/dadiviximete.pdfIn PDF document text
    • https://gaxadujabe.weebly.com/uploads/1/3/0/7/130775632/fomokipubujan.pdfIn PDF document text
    • http://tasimidu.iblogger.org/platform_university_annaba.pdfIn PDF document text
    • http://doriwev.iblogger.org/87610788083.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/tuxexi/afterglow_the_driver_era.pdfIn PDF document text
    • https://s3.amazonaws.com/wesezuzuvalirik/kannada_love_feeling_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/64534395062.pdfIn PDF document text
    • http://raziwisubuza.rf.gd/xovetizoxozudaf.pdfIn PDF document text
    • http://talifox.rf.gd/xuzejivijag.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/rijegexu.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/arabic_english_dictionary_online.pdfIn PDF document text
    • http://korobuvorudetiv.rf.gd/95744371117.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/european_colorectal_cancer_screening_guidelines_working_group.pdfIn PDF document text
    • http://gatutob.rf.gd/whitfield_pellet_stove_manuals.pdfIn PDF document text
    • http://xofunuxemijowex.rf.gd/grown_up_christmas_list_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/free_powerpoint_templates_for_information_technology.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_off0000d8fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FD 5492 bytes
SHA-256: 54c8aed96723c5e79e30b148cb8373274b912ee960c3736c6b0fd0e11332674f
font_01_sfnt_off0000ebba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBA 10184 bytes
SHA-256: bdde0f420c647b3964486a2bee153528fdb9b5602c7207ac066d54323de55d61

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