Malicious PDF — malware analysis report

Static analysis result for SHA-256 33a4f8977b191108…

MALICIOUS

PDF

69.7 KB Created: 2021-03-04 23:37:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c473478d55a06bb98bdf9d29b1ebc911 SHA-1: ff8bc3ddfa4c196610d766549246662b5a93bba9 SHA-256: 33a4f8977b191108176aeb201b77af7727d3be990e63eef1c6411a92ff3e96e0
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://druttle.ru/wix?keyword=zula+kay+c4+b1th PDF link annotation
    • https://kovuvewu.weebly.com/uploads/1/3/2/6/132695697/delutovurux_womegevi_japenakew_narobob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402014/normal_6016bcc43fd33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5fd2a52627afb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409095/normal_5fe82e4f79e24.pdfIn PDF document text
    • https://dobuzitususuv.weebly.com/uploads/1/3/4/4/134470967/3614154.pdfIn PDF document text
    • https://fezugewibopav.weebly.com/uploads/1/3/5/3/135346468/2655266.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426062/normal_5fd1ece270157.pdfIn PDF document text
    • https://bivawufixusu.weebly.com/uploads/1/3/1/4/131453301/a1bef3ed3cfbfa3.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/papuja/selegutumuni.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/basketball_clipart_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/nudiwu.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/20901396168.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/jesepogareginugeseviluve.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/ziwosanurogodotef.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/gcf_polynomials_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/56535321381.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/sum_function_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/art_elements_and_principles_test_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/zipijotatufo.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/archeage_ebonsong_6._0_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/polygon_worksheets_grade_4.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/paint_shop_pro_2018_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/44566387731.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_off0000d2f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F4 5016 bytes
SHA-256: 2bd09671de74341660cb5b522135b2a58e8502a70a5d6add5e484d30da49a44f
font_01_sfnt_off0000e422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 10628 bytes
SHA-256: 090a03422a2dfc50148470e24326b49b253d93aac7719b371d1f3fd68910cedd