Malicious PDF — malware analysis report

Static analysis result for SHA-256 d423caf317ec35c5…

MALICIOUS

PDF

68.9 KB Created: 2021-02-15 15:58:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e05671bdafc6ce5c73ead2895d2de83a SHA-1: 5044be9da3aa1029e467598698727c85b2ce0ff0 SHA-256: d423caf317ec35c52dcdcce111ef19a8b611d90794c1ca4f3854fe7e16a52a25
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://maypoin.ru/aws?utm_term=how+to+turn+up+volume+on+shower+speaker PDF link annotation
    • https://cdn.sqhk.co/pedajobu/JLii6ge/sumifuwopalaruwiwavumaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495681/normal_6028e31c8a200.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/shbhfhj/road_width_turning_radius.pdfIn PDF document text
    • https://cdn.sqhk.co/lunajevon/cSictmj/dojalologoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484806/normal_5fe0e96cd6d21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425229/normal_5ff450a6746fc.pdfIn PDF document text
    • http://davufemalolaj.iblogger.org/performance_appraisal_comments_for_nurses.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/wozowuledij/christie_lx605_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/natewared/sarige.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/zilozogo.pdfIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/ancient_chinese_chariots_answer_key.pdfIn PDF document text
    • http://sotilikesad.epizy.com/hard_foam_sheet_buy_online.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/lerekub.pdfIn PDF document text
    • http://rajiwewovipu.epizy.com/turboprop_flight_simulator_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/formel_for_areal_av_sirkelsegment.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_off0000cffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFD 5236 bytes
SHA-256: 706e1436bd447764d9845420fdf8e56079fdace4a5a5fede47807a8ad8e59251
font_01_sfnt_off0000e1b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B0 10832 bytes
SHA-256: c3c12dae9c286c1dbbf6a5f8a63bfdd836e31372a809b4e94a85576b752150d5