Malicious PDF — malware analysis report

Static analysis result for SHA-256 244751bc987d8eb6…

MALICIOUS

PDF

72.0 KB Created: 2021-02-18 03:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7694ce6c2284d0cc3c8f0d962e087e38 SHA-1: 3785dccbe53f2beee646a7bd5508b45f3025baad SHA-256: 244751bc987d8eb68794f3c437e4ccd825923c8b6a9869981006d2cca8429e68
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=chicken+genetics+answer+key+pdf PDF link annotation
    • https://cdn.sqhk.co/kerosumumato/2HjgauH/27519258268.pdfIn PDF document text
    • http://verenica.net/angelcare_baby_bath_seat_aldi69a52.pdfIn PDF document text
    • https://cdn.sqhk.co/nogorodizet/cjbjepr/jojuvixivoxisenesutapeb.pdfIn PDF document text
    • http://belkwigs.com/just_drive_simulator_gameplayov83s.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/BXLujct/17382365351.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495531/normal_5fd2cf29a3b82.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365628/normal_6005241ada841.pdfIn PDF document text
    • http://stopnutristrike.ru/nova_galaxi_dvr_1644_lathe_reviewklfzt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_5fdb27e98b713.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/jivagajamav/runikamexesezujodepe.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/7551071744.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/rational_function_word_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/sales_engineer_job_description_template.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/flowers_for_algernon_summary_progress_report_12.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_off0000dc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0B 5548 bytes
SHA-256: b5ae6f6666f9d4b86dfd9cf71d8f61cc06bbcfa3cf066aa60b9ee0566263490e
font_01_sfnt_off0000ef00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 10464 bytes
SHA-256: 3da8aa500d7314d230103a67e85e5c2fb133362ad35257e2628c9337978cb595