Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f94c1d0b83349d6…

MALICIOUS

PDF

71.5 KB Created: 2021-02-19 10:54:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 99686e292d59de03c15124845e4103ae SHA-1: 298ec7a7e602a5c507dd1f2facaa103b0c610bed SHA-256: 0f94c1d0b83349d69e72a84457d7716ec0821a393c90c3630ff8e4ace0129f73
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://jacksth.ru/wix?keyword=isotherm+and+isobar+maps+worksheet+answer+key PDF link annotation
    • http://ceter.xyz/internet_of_things_report_2018sr8d7.pdfIn PDF document text
    • https://dexasarejujevi.weebly.com/uploads/1/3/1/4/131454537/4323.pdfIn PDF document text
    • https://rikusinifo.weebly.com/uploads/1/3/4/0/134017093/soxoxid.pdfIn PDF document text
    • https://devojakosumu.weebly.com/uploads/1/3/5/3/135314674/1741969.pdfIn PDF document text
    • https://vamubediva.weebly.com/uploads/1/3/4/9/134901044/logosiwam.pdfIn PDF document text
    • http://hookup154.fun/bivepteh6t.pdfIn PDF document text
    • http://itrom.fun/4_conceptos_de_contabilidad_y_sus_autoresw5avz.pdfIn PDF document text
    • http://creditscorerepair.info/samsung_un46b6000vfxza_remotej94ig.pdfIn PDF document text
    • http://austritkfa.com/magnus_the_red_8th_edition_datasheet3lr05.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/nodetuxapabara/64744781791.pdfIn PDF document text
    • http://wupewujivijulo.epizy.com/apache_tomcat_9_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pubopelej/aditya_hrudayam_sanskrit.pdfIn PDF document text
    • http://xizevobawilu.epizy.com/gumigoraz.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/50684271375.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/import_bookmarks_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/gudukupir/59089345655.pdfIn PDF document text
    • http://muxovunibo.epizy.com/75204078966.pdfIn PDF document text
    • http://nopexuwub.rf.gd/bosuduresolum.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_off0000db45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB45 5500 bytes
SHA-256: 6c76ab2d06e6ddf2ed4634e2a5e9987869517022ea657ac978fbcc30317bdcf7
font_01_sfnt_off0000edda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDDA 10208 bytes
SHA-256: c734fdc53607763e674349817b23ab44b1027e36351a7ed225f1d788bc6954b1

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