Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b4cf940918bd6f0…

MALICIOUS

PDF

73.1 KB Created: 2021-02-25 18:33:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 666b741f32bb794d41619635076c7dc1 SHA-1: 3cc4414167505a33e9539a1e1c4bbf834dd8cf20 SHA-256: 4b4cf940918bd6f029b8d776c74b746c35dfd79406062ea1dcb3224aa280b216
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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://seumenha.ru/award?keyword=see+the+medicare+benefit+policy+manual+chapter+15 PDF link annotation
    • https://cdn.sqhk.co/wibezudak/dqpCOji/radio_online_usa_easy_listening.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_5ff7f2b0ef2fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473954/normal_6008b7169d2d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379500/normal_5ff4cb356a517.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446377/normal_5fd799dab8354.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413370/normal_5fc825a00b9bb.pdfIn PDF document text
    • https://cdn.sqhk.co/vozumolajaw/TyWTbb6/message_app_qksms.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/rebizu.pdfIn PDF document text
    • https://cdn.sqhk.co/leluforeref/j9Iihid/year_of_the_rabbit_season_2_air_date.pdfIn PDF document text
    • http://gagimubu.mywebcommunity.org/paburofogadu.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/how_to_say_phthalo_blue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491436/normal_5ff0240894417.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/jesidofefe/makkar_ielts_speaking_2019_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/16551978402.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/math_investigation_report_examples.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_off0000e112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE112 5736 bytes
SHA-256: 8a1a2107c3d29ff83d84ac6ce9e9a8e593c36ee5e52f515096ab5921130d794e
font_01_sfnt_off0000f479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF479 10152 bytes
SHA-256: 6260e893a66ee8b59faf74f284c75e25b1eaef8f3dbbd3402e78abd57bb764da