Malicious PDF — malware analysis report

Static analysis result for SHA-256 623fb876c5050390…

MALICIOUS

PDF

68.4 KB Created: 2021-02-22 22:46:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 3f4253c35f5b81396489ae6e23b1e7c5 SHA-1: 7e037aa52caa4df19df9be911dcca424cddc0ea8 SHA-256: 623fb876c50503904c7f74b68522e5713d37a0247205bbd8321fb6d517a6a238
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://druttle.ru/wix?keyword=liters+and+milliliters+worksheets+3rd+grade PDF link annotation
    • https://cdn.sqhk.co/dugixikisim/jdifDA0/zibulopunuwulujamadata.pdfIn PDF document text
    • http://lnstagramcopyrightservices.org/did_eurydice_love_orpheuskra67.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxebiseso/Dij0ymg/bibavezimuvadafifivaxexew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368478/normal_5fee69e596bdc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389107/normal_5fce428d019e9.pdfIn PDF document text
    • https://cdn.sqhk.co/beratinuga/ghhxhjJ/vowere.pdfIn PDF document text
    • http://ig-support-service.com/dotoxo9gl04.pdfIn PDF document text
    • http://distornyup.site/review_two_excel_sheets_side_by_sidez57n0.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/uber_car_booking_app_freeplbv3.pdfIn PDF document text
    • http://baffer-shop.space/bexut538ze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421468/normal_5fdbd356e650b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469351/normal_60092652247d1.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/dopugaxelelema/63831339004.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/last_airbender_2_movie_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/cash_flow_quadrant_review.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/abc_spell_check_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/medication_administration_form.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/wekunasogofome.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_off0000cddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDD 5500 bytes
SHA-256: 2d8db3b91d36eff9ccba773d2dac23e6f99f3e6ea1339b18f694fb45bec57b37
font_01_sfnt_off0000e081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE081 10556 bytes
SHA-256: 15a54e0426aeb5707ce197cd9f0907aab5d1fdb58dbe01096063d4143e70bc63