Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b82619307cc681…

MALICIOUS

PDF

82.1 KB Created: 2021-02-17 03:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 056fb1ffb93d502750373743d60b3c92 SHA-1: 99a01143eaa20c51337b823492f0ff5456074c3e SHA-256: 17b82619307cc681d653703ac0aec0b681e2824f4bae5eaade9413328359d57f
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/123?utm_term=gmat+books+pdf+2019 PDF link annotation
    • http://freshmind.net/tuile_photovoltaique_saint_gobain171v3.pdfIn PDF document text
    • https://vowagogo.weebly.com/uploads/1/3/5/3/135307183/wujaguporen.pdfIn PDF document text
    • https://vumerajijo.weebly.com/uploads/1/3/2/8/132815742/ridumumabazado_zasev_lukolor_lepinobikejam.pdfIn PDF document text
    • https://kapovisawok.weebly.com/uploads/1/3/4/6/134652754/kowitajer.pdfIn PDF document text
    • https://ruxikikigiligex.weebly.com/uploads/1/3/4/3/134347308/zuserinatoxuduf.pdfIn PDF document text
    • https://jimurapixow.weebly.com/uploads/1/3/5/3/135399705/falatezo.pdfIn PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/5794c467.pdfIn PDF document text
    • https://risimomumet.weebly.com/uploads/1/3/0/8/130814588/f5026e697e8c.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/lupebesu/lilex.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/fiddle_faddle_leroy_anderson_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/jabra_headset_whb003bs_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/salsa_contest_winner_certificate_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/will_the_selection_be_on_netflix.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/vidmate_video_er_for_iphone.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/9529948559.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_off00010081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10081 5776 bytes
SHA-256: 1d285a52e473a71c42663d0f8831cdd28d375bf0c09219543ab54783877a1f97
font_01_sfnt_off00011419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11419 11716 bytes
SHA-256: 55ad26d4e9cb75bc72a61520b7b160e247b22b2559c6fda5f45ff5b2abf9558f