Malicious PDF — malware analysis report

Static analysis result for SHA-256 841aa83ddf98e330…

MALICIOUS

PDF

79.5 KB Created: 2021-02-16 21:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 34663acb103577d324cbea2577bf1f9a SHA-1: da6af1912427cf18831caa02d29533affbd95891 SHA-256: 841aa83ddf98e330c5026f8862035b756dd251738ee06010c4642cafb5409c5c
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://baarspo.ru/wix?keyword=journal+of+mathematics+teacher+education PDF link annotation
    • https://cdn.sqhk.co/pazaxefuma/bjjgjja/kendall_and_kylie_fight_video.pdfIn PDF document text
    • http://xukugolipanizo.iblogger.org/bwv_1007_violin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424996/normal_601e74c4ace75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494677/normal_6016b80d3f4e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461234/normal_5fc999bdade28.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/wajibile/zitadufajefitosigakapufuz.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/ropovuvuriluzemoliluti.pdfIn PDF document text
    • http://matogojetize.rf.gd/animated_movies_2017_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/gazijewevan/57105739301.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/jigegebavutelixev.pdfIn PDF document text
    • http://segivatoku.epizy.com/31837851539.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/mugexupokixa.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/25034649894.pdfIn PDF document text
    • https://s3.amazonaws.com/zukogi/jurnal_internasional_akuntansi_perpajakan.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/french_dictionary_app_android_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_off0000fb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB43 5248 bytes
SHA-256: 332c663cf680ca951390151b4385229676d06b08c9e2f4407fbcd4e3f6ef51ba
font_01_sfnt_off00010cf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF0 10572 bytes
SHA-256: d08322fd1bb74eaecff3fe58005e17564dc601dbe351fef3cec964457e729370