Malicious PDF — malware analysis report

Static analysis result for SHA-256 913be189e4bf6c0b…

MALICIOUS

PDF

64.6 KB Created: 2021-02-18 12:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 30a1b0e4e73d271d351f8056616c5276 SHA-1: cc76327ce5b47ed506aa5b00d939b69e98134e92 SHA-256: 913be189e4bf6c0b9eaabe42090fb1c36370e54dcb4bd63b27bb2a2c7cc4a9b5
202 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://yafferge.ru/wix?keyword=st+peter%2527s+portal+login In PDF document text
    • https://cdn.sqhk.co/tumupowe/jF7iayh/99696848018.pdfIn PDF document text
    • https://cdn.sqhk.co/kowalaxu/d1gcOie/sibixijivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380080/normal_60190b3e3f0a5.pdfIn PDF document text
    • https://cdn.sqhk.co/refevebux/bjhgijh/ranolezumijituz.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/ie56gj9/wejozejiwaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445733/normal_6029a872a28cd.pdfIn PDF document text
    • http://nuzadovokebin.iblogger.org/wulexusuwaginirakog.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/jhgWhh0/95480023879.pdfIn PDF document text
    • https://cdn.sqhk.co/nugofonavuf/JTPiehf/dungeon_keeper_game_review.pdfIn PDF document text
    • https://cdn.sqhk.co/risenulowo/ieAjeXG/todivakitaxakukiravose.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vepunip.rf.gd/fuxasorufeno.pdfIn PDF document text
    • http://vojebijawutirus.rf.gd/tappan_oven_control_panel.pdfIn PDF document text
    • http://tuninedup.epizy.com/almost_a_hero_guide_team.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_off0000c27a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC27A 5124 bytes
SHA-256: 2c92852635db98de708d0c96194571565a27feed03cd80599451de143e4e9431
font_01_sfnt_off0000d3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F6 9944 bytes
SHA-256: 9d820d4f05dd4c5ff886424cc6a90b765bf7f937a56050e067dd9f9e6fb57fed