Malicious PDF — malware analysis report

Static analysis result for SHA-256 77f737096080df50…

MALICIOUS

PDF

71.4 KB Created: 2021-02-22 16:02:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: f496ed0157f01f1664c3dd09acbeedce SHA-1: 7e725c4fed20a7e9fe3713c51beefb5dc6abc919 SHA-256: 77f737096080df50da73c6ee207d6c44e39d6eb0136d0a41f3079d5d7f97dc27
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://leonvi.ru/wix?keyword=hilary+and+jackie+parents+guide PDF link annotation
    • https://cdn.sqhk.co/bubiwalifeda/pFygflz/84495655187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381546/normal_5fc70a8aabe6e.pdfIn PDF document text
    • https://cdn.sqhk.co/kugefiruxat/hbjetid/31496534516.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460461/normal_5fc7e7c53063b.pdfIn PDF document text
    • http://zipogagu.iblogger.org/grade_2_maths_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/riteximeras/jmXGcPR/88546807049.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/eHjhehe/ways_to_improve_traffic_calming.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/fadobirak/30105434587.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/43329803142.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/77246079410.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/vesomariwemivu.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/bamojevomavuxorivigokos.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/84185259561.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/open_broadcaster_software_studio.pdfIn PDF document text
    • http://pewesinelukaveb.epizy.com/95784034489.pdfIn PDF document text
    • http://dopuviboxew.rf.gd/25534028542.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_off0000d901.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD901 5444 bytes
SHA-256: f91944c65af12f4fb2e40809e117b051926454a26dd5e77d099b6020a5242954
font_01_sfnt_off0000eba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA4 10844 bytes
SHA-256: 57052c374fe614ef14bfb92e1154c8843a3ac5b1741cba6843ac112856d62683