Malicious PDF — malware analysis report

Static analysis result for SHA-256 945f5cc53a42bbfb…

MALICIOUS

PDF

61.6 KB Created: 2020-12-09 02:55:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2e83efde45c89225902a1ae87fc9f1eb SHA-1: 823d009198cb11a09575af83453d8940db7bd665 SHA-256: 945f5cc53a42bbfbafae02c49ba62455b35ddd440aee8421c699d507e660d9ce
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafffe.ru/wb?keyword=bloons%20td%205%20apk%20apkpure PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4371246/normal_5f91c59c76e49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5fa2fc8f3ebf5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bfadc20-061c-4b79-a5f8-9be9b8c3015b/komoroduj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b72f962-8a9f-47c7-9f4c-56b6ba459fab/57875563444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e112f04f-b2ec-4b6a-8c97-f848f328de38/section_197_intangibles_list.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/40414995887.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/nuxufetowabuket.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2073341d-a3e7-4601-aff9-14a4be719e7f/oxygnothrapie_soins_infirmiers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9c49de9-3f5b-4f45-86f3-9619f36e943b/dofantasy_comics_descarga_gratuita_e.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/catalogo_de_filtros_tecfil.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/79520748576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a74eef-8af7-4539-aacf-00e257c75e1d/12298342971.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af235095-39e9-4317-a109-af0a9aa80977/endosymbiotic_theory_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb5adfc-d0d7-4ad1-9db3-02df9eaa7463/astro_a50_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7d8e075-2f71-497f-ae1b-4e85e4053899/3943547692.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_off0000b5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5C6 5192 bytes
SHA-256: 633cdd3f3a27a3682ab79a1f9718d390d1a323362400af432f11de4efd4f7fcd
font_01_sfnt_off0000c781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC781 10072 bytes
SHA-256: 58d6a1ae0d5fd518027281abcba4ea8bfb2a39ab8af15d3cdbb1c7107a170a94