Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca22d7c5d24ea1e…

MALICIOUS

PDF

70.8 KB Created: 2021-02-11 08:05:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9a35f753a63bc44fe3af75a839e53d33 SHA-1: f568671c1b2ce8b5fab00f07d797bbce34ade5a5 SHA-256: 9ca22d7c5d24ea1e269ab4443c2c81fed05c39fc699879da16ff91bc5daf797c
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://jacksth.ru/wb?keyword=article%20238%20bis%20du%20cgi%20pdf PDF link annotation
    • http://trenolgia.buzz/hypocrisy_in_the_cruciblepaao3.pdfIn PDF document text
    • https://xuwogojike.weebly.com/uploads/1/3/1/3/131380868/zujunopibalu.pdfIn PDF document text
    • http://idealslim-ordina.site/insurgent_full_movie_hdpopcornjkutk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380527/normal_5ffb6d4ab8e11.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378827/normal_5fe8659b79b97.pdfIn PDF document text
    • https://koloputumoti.weebly.com/uploads/1/3/4/8/134887370/pufakikaguj-wapug.pdfIn PDF document text
    • https://lopowizuxo.weebly.com/uploads/1/3/4/4/134438001/xibomesigo.pdfIn PDF document text
    • https://borotopod.weebly.com/uploads/1/3/3/9/133997632/c85a6ffe758.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477892/normal_5fdf24056ecde.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/gumegulaxi/retaxipotuwomigowodak.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/pufiritatilibewitike.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/academic_calendar_template_to_print.pdfIn PDF document text
    • https://s3.amazonaws.com/suxuzubojut/5915750704.pdfIn PDF document text
    • http://tixinova.rf.gd/manual_radio_citroen_c3_2008.pdfIn PDF document text
    • https://s3.amazonaws.com/lososimap/jane_zhang_all_of_me_mp4.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_off0000d75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75D 5732 bytes
SHA-256: 0dff7f3671a470898ed48a26b7666591b9daf1aa5db8e46252efae6567e71813
font_01_sfnt_off0000eaf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF3 10380 bytes
SHA-256: aa2a2d702986a7d19470805497d76f83071c045d703fd7b1138444c5c8d7d85d