Malicious PDF — malware analysis report

Static analysis result for SHA-256 18696c0a81ad5f0f…

MALICIOUS

PDF

75.0 KB Created: 2021-02-24 23:16:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 85a1f873ad37deb8b2c6d2da347b3f2b SHA-1: 45a35ef3fec4b817ae93c79a9bb744d67d0ec35b SHA-256: 18696c0a81ad5f0fad96c54ceeb3a557d06bb004364b426af49af89abe61f884
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://crophysi.ru/wb?keyword=what%20happens%20at%20the%20end%20of%20the%20mist In PDF document text
    • https://static.s123-cdn-static.com/uploads/4369505/normal_60003896617ed.pdfIn PDF document text
    • https://wiwovadale.weebly.com/uploads/1/3/5/3/135322143/xazaraxumugozeg.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/how_to_watch_little_fires_everywhere_show.pdfIn PDF document text
    • https://lififotepul.weebly.com/uploads/1/3/4/3/134339298/1539670.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390661/normal_5ff8cbe2cd427.pdfIn PDF document text
    • http://gafujovinotu.22web.org/dibulopabidutidoba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459777/normal_5ff1e96924ec6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421058/normal_5fede88786c67.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/modo_de_produccin_de_la_comunidad_primitiva.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/54998366426.pdfIn PDF document text
    • http://fekevopimibun.sportsontheweb.net/charlie_and_the_chocolate_factory_music_original.pdfIn PDF document text
    • https://vigodabazo.weebly.com/uploads/1/3/4/8/134872933/jojefolavema-sanuvadiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408703/normal_601e3db3bbc7f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tolamepaduxeju.rf.gd/descargar_baidu_root_apk_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/rolunobatufiji.pdfIn PDF document text
    • http://dexifuv.epizy.com/gift_card_mockup_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/58206860150.pdfIn PDF document text
    • https://s3.amazonaws.com/tapelu/zaner_bloser_handwriting_worksheets_free.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_off0000ea90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 5164 bytes
SHA-256: 9c4098d1ec05663fa080c80ed52481ba2dfa7e505892676781091bab1b92245b
font_01_sfnt_off0000fc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC10 10312 bytes
SHA-256: c54db7d638ee10aa4714a4965ef4378d57b4029403d41b94b5e6812b9c50b323