Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a98e316e535fb75…

MALICIOUS

PDF

67.1 KB Created: 2021-03-01 17:42:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: a8270831fd4becf9ad158299c29a9556 SHA-1: 9c91157d3384813331957e4a98c239b626b3cc07 SHA-256: 7a98e316e535fb75a1b9f370332183f5ddf0f426f3bfdf3aac8381e52fe3680f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=basic+biomechanics+susan+hall+7th+edition PDF link annotation
    • https://cdn.sqhk.co/wubunepan/ggmnVid/vitovukukejewerexazir.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462037/normal_5fe8e805c1063.pdfIn PDF document text
    • https://cdn.sqhk.co/jixuvepabu/iLBnh89/nedabitibuwukowixamome.pdfIn PDF document text
    • http://c-advance.space/como_son_los_derechos_humanos_en_estados_unidos5e1nb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465397/normal_60002eadd7434.pdfIn PDF document text
    • https://cdn.sqhk.co/noviraxat/ddgcsii/escuela_de_negocios_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446399/normal_6010b48bd0140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_600f7b3c9f068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413223/normal_602112eeea097.pdfIn PDF document text
    • https://cdn.sqhk.co/vexavudakepa/8ijjdib/blockman_go_bedwars_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_5ffcefd255db7.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/wifiduxezo/ritedonatuninuxiv.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/ielts_reading_answer_sheet_filled.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/malignant_neoplasm_of_blood-_forming_tissues.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_off0000c8a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8A8 5352 bytes
SHA-256: 0b10f308ff67e1325ba6c396eb69b25670b89d98970a21471a431a12ad38fafc
font_01_sfnt_off0000dab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB9 10404 bytes
SHA-256: bb241193061c6e5ef0d1d73a0d21ac9e46c5be452f52355ddf1d2e68f911fbc7