Malicious PDF — malware analysis report

Static analysis result for SHA-256 287f2e9f7e5ddf4b…

MALICIOUS

PDF

64.6 KB Created: 2021-02-26 18:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 049c166cd0dcac6b0a235498ffba97a6 SHA-1: adc2dbc7781d6c7b9650f1902a267e25d373edaf SHA-256: 287f2e9f7e5ddf4bb8c10eb84b2ae1e2b13ba0b04d1a24d979b1d518e2df7aa6
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://zajinet.ru/award?keyword=how+to+start+an+article+review PDF link annotation
    • https://cdn.sqhk.co/xawodoze/gjciUN8/wood_shop_layout_designs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_60266634b6369.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450421/normal_5fda23a5d25c7.pdfIn PDF document text
    • https://cdn.sqhk.co/fejisunez/phiichf/cooking_adventure_hack_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/ihif3SD/22546029677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366398/normal_6031d8f42f9eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426408/normal_5fcdb24ad3128.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/dale_carnegie_how_to_win_friends_in_the_digital_age.pdfIn PDF document text
    • https://cdn.sqhk.co/luwiwaduna/gig2ojh/podafubotanon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481272/normal_6013a44fe2cc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_5fd62c0e55162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376870/normal_5fe85336e43f1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nojikigor.myartsonline.com/basic_molecular_biology_textbook.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/83271667787.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/chemistry_practical_book_for_class_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_off0000c351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC351 4904 bytes
SHA-256: 9a1c78a106de91d62537b27d98e4563648c01c071a0f40c7380118576ee7102f
font_01_sfnt_off0000d420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD420 9676 bytes
SHA-256: e9cab53142d7b75ea4ccefd6a38c4282b2e0925d9e9277ba7c715593a2726569