Malicious PDF — malware analysis report

Static analysis result for SHA-256 314399fe95f3d08b…

MALICIOUS

PDF

70.8 KB Created: 2021-02-18 04:26:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 55e0300c0bcb77d1bec88d0ef73d32ed SHA-1: 4356c14049bed323ec0eecd24d4be148cfb81773 SHA-256: 314399fe95f3d08b49169ca09010c7155f8f653cb104fba2c180cc82a9bd284e
194 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
  • 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.
  • 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=blackboard+ttu+k12 In PDF document text
    • https://cdn.sqhk.co/kawiwitifa/jyohiia/fuparagonepibisek.pdfIn PDF document text
    • https://zalamozosuk.weebly.com/uploads/1/3/6/0/136089451/8221879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_6013e9228dc57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_6019087c53565.pdfIn PDF document text
    • http://takipleskazan.org/catfish_nev_wifeevipa.pdfIn PDF document text
    • http://fitness1.space/envision_algebra_1_enrichment_answers2idvo.pdfIn PDF document text
    • http://roskycnmx.com/tigezimokixidumano3uect.pdfIn PDF document text
    • http://bettyloustintruckbbq.com/3202124227275dmb.pdfIn PDF document text
    • http://idealica-italy.site/142650868985a9hz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_6024354b2af31.pdfIn PDF document text
    • http://letnesil.xyz/heidelberg_catechism_question_and_answer_oneysr9c.pdfIn PDF document text
    • http://citruss.space/58210688761c1zeq.pdfIn PDF document text
    • https://cdn.sqhk.co/bosesegivu/bgcibwq/serrurier_ivry_sur_seine_94200.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/mevuzokekenojab/wofepud.pdfIn PDF document text
    • https://s3.amazonaws.com/netinuwa/63041318927.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/58723974920.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/64800030834.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_off0000d8d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D9 5192 bytes
SHA-256: 279595ae95ac1ea80b0a7f965d5c66db363e3376573bf74fdbd0bb75fc541246
font_01_sfnt_off0000ea94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA94 10396 bytes
SHA-256: 56389628d205ed2ad970d4e902e95e2a1ac1c872e8761c8d8c399dc502a52c07