Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde69bf090fd680b…

MALICIOUS

PDF

73.1 KB Created: 2021-03-01 16:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 67b414db2b450f1c63043124730942cb SHA-1: 2e7e7d531e5ba8d4bee8df376b2214a35856d404 SHA-256: dde69bf090fd680bbe1f30e758e0e28e682a263227a1323e419b0fb9ed1902b9
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/award?keyword=nzxt+phantom+820+side+panel PDF link annotation
    • https://cdn.sqhk.co/talexadu/cia1vA0/35177857681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382420/normal_6028f7c38b5fc.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/ade7805a0f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424933/normal_5fdd7cc4ac9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402488/normal_601a61bbc3449.pdfIn PDF document text
    • https://nakojuxipesasam.weebly.com/uploads/1/3/0/7/130776326/tinix.pdfIn PDF document text
    • https://cdn.sqhk.co/lojeliju/69ImChg/spirit_level_app_for_iphone_6.pdfIn PDF document text
    • https://cdn.sqhk.co/luzigagoguna/Hbjgsia/can_i_paint_my_apple_watch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc989eeb30e7.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/jcjdDR3/65132055782.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuramefa.rf.gd/wordpress_download_monitor_404_error.pdfIn PDF document text
    • http://wuzazuj.rf.gd/the_cask_of_amontillado_analysis_ppt.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_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 5660 bytes
SHA-256: 27a8aaed2399417728ebebfdd9ce72d784274a8a589fa8b41dd87417407d6f48
font_01_sfnt_off0000f2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F9 10280 bytes
SHA-256: bf1c077ca665a1109d4b86891fa9bc0d0e4975a8c00f7fd53cb0f7c74f857656