Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ba1b9eb02fd8ed…

MALICIOUS

PDF

68.7 KB Created: 2021-02-08 07:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 76a825cba5991cdec287d5dfdbfe2335 SHA-1: 176c304a3910f5d822b24074200c802e75437482 SHA-256: 52ba1b9eb02fd8ed9b2ae6d209c044b040dea7c23a27260c4b69f06dcad3d3f9
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/aws?utm_term=cplr+answer+to+interrogatories PDF link annotation
    • https://cdn.sqhk.co/zivunegas/rjcRVhh/rofowizosakalivezexowiw.pdfIn PDF document text
    • https://cdn.sqhk.co/wemopizajazo/geGRAge/9447034723.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/jjmjcgj/pic_this_word_picture_search.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/5APwejf/jodal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404515/normal_6010a5e282078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373509/normal_5ff68fd6b9d41.pdfIn PDF document text
    • https://cdn.sqhk.co/wovovoteg/CANiehg/zetefijoxinulawagegemiw.pdfIn PDF document text
    • http://nugekurobeju.iblogger.org/esl_interview_questions_and_answers_for_teachers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505096/normal_5ff17d20835be.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372963/normal_5ff571e9bfe84.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/JD13ja4/zolaretid.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489032/normal_5fc8617812725.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/peveziwoguxuzam/cydia_iphone_5s_free.pdfIn PDF document text
    • http://masegopadi.epizy.com/85614750444.pdfIn PDF document text
    • http://radagosedapisat.epizy.com/watch_live_sports_apk.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_off0000d213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD213 4984 bytes
SHA-256: d8383ad9b2138d2fdb07902b0d3438844c92294f57182014573f01f6b96e5c61
font_01_sfnt_off0000e322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE322 10320 bytes
SHA-256: 7bdfac183a73f47f9f47f313313b72978bde215c94c161fadf3a7a779df2b027