Malicious PDF — malware analysis report

Static analysis result for SHA-256 74033f7b9ac3d0d5…

MALICIOUS

PDF

66.8 KB Created: 2021-02-28 14:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bc1af82f358340e7dbe47bb2a88b7067 SHA-1: 2c9dffd767a950351ccd2d40940c516d4b6d528b SHA-256: 74033f7b9ac3d0d5dc484904290338cf5ea9fd101d430ab13ec3dacb681879ec
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=certification+manual+for+welding+inspectors+fourth+edition PDF link annotation
    • https://cdn.sqhk.co/ruzaxube/j6hiSha/kigetonezugojivigedomokir.pdfIn PDF document text
    • http://kvyovk.xyz/exercicios_converso_de_escalas_termomtricasodtl1.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/LhaXeji/celebrity_quiz_answers_level_91.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/bofuzo.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/7179303028.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/how_to_clean_bosch_ascenta_dishwasher.pdfIn PDF document text
    • https://povemiloten.weebly.com/uploads/1/3/4/6/134608376/lubame-vevuwibekitid-nibumupurizul-zenozizubofa.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/corsair_commander_pro_setup.pdfIn PDF document text
    • http://kemamibuke.mygamesonline.org/who_invented_the_phone_and_why.pdfIn PDF document text
    • https://cdn.sqhk.co/wufevinek/DZ4FhbW/45384776135.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/mudurixo/thk_linear_guide_calculation.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/48182477759.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/3571818462.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/killing_joke_80s_lyrics.pdfIn PDF document text
    • http://gutekuretejapoj.onlinewebshop.net/45485973405.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_off0000c54a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC54A 5564 bytes
SHA-256: 69d7df2b0a4b4b49a0b723fb93ae204e85310f15ad116baf19ba93d53e63f8d2
font_01_sfnt_off0000d81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD81C 11680 bytes
SHA-256: 4ea812f3f004193003b804099b0430e43f07b3f2cc14a56f25fc02e6357f540e