Malicious PDF — malware analysis report

Static analysis result for SHA-256 70fb1cff8250b645…

MALICIOUS

PDF

60.1 KB Created: 2020-11-09 19:42:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: dc3963adb7ba8dd4aded1d9877f07028 SHA-1: 121580949bc37430ec2040345015dc5598f6314f SHA-256: 70fb1cff8250b6458eb066d6521d68e7f0d27b261b2c8c348efed226fa552adb
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/wb?keyword=karen%20scott%20shoes%20reviews In PDF document text
    • https://cdn-cms.f-static.net/uploads/4404503/normal_5fa5f62d1ac92.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/pusolefosex/blockchain_trends_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af6ff68a-068c-42bd-b77f-02c433c809eb/xogifabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/366d887c-8662-4d48-81c2-4ce5a3ce47e1/53048152690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62596867-f65d-430a-9e9b-6f8579aee038/descargar_peliculas_cristianas_por_u.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/codigo_internacional_nomenclatura_botanica.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/marxist_theory_in_hamlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a31cf28b-57bb-4fb6-ba57-933226e28e03/infinity_gauntlet_mod_for_minecraft_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/repaso_de_verbos_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ab0836-beb3-44ab-ac4b-2121f3a9281f/40617872812.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4125f453-6613-41e7-bb16-ff3ec5830132/79029467962.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/32632382574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fd64444-d2d0-4637-836e-e8bec5a8d6b4/jametu.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_off0000ae07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE07 4976 bytes
SHA-256: 4a762db57e8ded86c2969367dbbb1e4a125c6f10f34eeaa2516d7c99e02b6910
font_01_sfnt_off0000bf07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF07 10944 bytes
SHA-256: d2eb1edc667b495de320f5d71c510fff471f615dd386fb8c9f9b9daa52d76a3f