Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ed10ffba7f3c973…

MALICIOUS

PDF

71.1 KB Created: 2021-02-03 08:44:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4e9a0bf3aa67149d798d984c7d67cc2c SHA-1: 2fe000a0aed4d017ae998bdb0aa841e30835beb6 SHA-256: 5ed10ffba7f3c973f2471e5229133f895f0b403bd74caf7cd22353610b06abf6
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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/aws?utm_term=dewey+beach+weather+report In PDF document text
    • https://cdn.sqhk.co/sejixikerut/che8jid/93508584361.pdfIn PDF document text
    • https://cdn.sqhk.co/losokifape/eiehiVE/lofafoti.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/XhhYggD/nepujurozivu.pdfIn PDF document text
    • https://cdn.sqhk.co/dutararopat/hcWWhdW/dumb_ways_to_die_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/s2ibqjj/medukokexoganaxukuduniror.pdfIn PDF document text
    • https://cdn.sqhk.co/konarolikomu/ogihbQU/siwasosuviraganowifejire.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/giodwO6/zombieville_usa_2_apk_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/V5Rghjd/technology_education_6-_12_study_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/hiECgj2/worms_zone_io_game_hack.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503692/normal_5fe0319a87f64.pdfIn PDF document text
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/8558736.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/iVhcY8t/free_download_real_boxing_2_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gawagunikuw/ocBjhvC/wobuxuwapak.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/fapaga/16198338601.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/google_chrome_latest_update_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_off0000d9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F3 5144 bytes
SHA-256: d7b7974b233c97691d648b7577e7b8e3ae06fca19993b468d2a277628d271636
font_01_sfnt_off0000eb8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB8D 10556 bytes
SHA-256: 136b2b93c84ed88df7ad9c7728c5abf6f80b4d1d6a344609e379ce87fe0398cc