Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ab2b81eb48834a…

MALICIOUS

PDF

71.4 KB Created: 2021-03-01 09:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2ec2c4e68d24bbed1531d92d46824e4f SHA-1: 38169cef029f275472e6cfdec927991d46567f17 SHA-256: d4ab2b81eb48834aaaf71ea5f701d0ca9eb15316ffe3804af4410f393968f863
194 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
  • 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://crophysi.ru/award?keyword=data+analytics+masters+online+no+gre In PDF document text
    • http://onlinetyz.xyz/synthesis_of_aspirin_lab_reporte0fbc.pdfIn PDF document text
    • https://cdn.sqhk.co/wepiwojeta/ghhigUD/alipayhk_use_in_china.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuvimavofo/hhhgpRT/word_search_games_for_kids.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417033/normal_6019c53d5b6a4.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvapolaxaj/cBheGhi/xusekaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483081/normal_5fd8ef0f27411.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/yCjjSut/arizona_school_shooting_threat_today.pdfIn PDF document text
    • http://springwin.space/zafejirusupotwb9t.pdfIn PDF document text
    • https://cdn.sqhk.co/lufezeralon/NSyFyhi/54355649643.pdfIn PDF document text
    • https://cdn.sqhk.co/kozuvurop/hdjbnOp/jasorazoparada.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471691/normal_6008a32a8c27f.pdfIn PDF document text
    • https://cdn.sqhk.co/kifuzopeko/ijihjN4/knight_rider_movie_2008.pdfIn PDF document text
    • https://cdn.sqhk.co/goworonol/8Bntx40/39973222591.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/5JgeIif/20911908368.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450257/normal_5ffff5b55ace4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417216/normal_602c303fba1c3.pdfIn PDF document text
    • http://sayseedokg.com/rofuvikowizowofi91f6x.pdfIn PDF document text
    • http://jumbochecker.com/tigefopakiwuvuxevetizebo5w92s.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000db85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB85 5220 bytes
SHA-256: eb83dd1883dfb85023a7cc489de7603b97cfa234a140423d3b87a06a71278ac9
font_01_sfnt_off0000ed44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED44 10340 bytes
SHA-256: 14375e8239365233cbd1af918468cafc8bc2b29f9d42d617f436be8fb05bf20e