Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a8a3ea4de49e13…

MALICIOUS

PDF

71.9 KB Created: 2021-03-03 19:35:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 2a674ecb8c107c1979b0e45b1073e623 SHA-1: d29eeeefec3e086718e8c3ea81c8a9866fa7f47e SHA-256: b0a8a3ea4de49e1365173cba67f86c7e6753d2f4ed49aa8908c547b66ab392d5
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/award?keyword=short+stories+audiobook+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460706/normal_602c249b2e757.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/cissp_for_dummies_latest_edition.pdfIn PDF document text
    • https://wonuxomi.weebly.com/uploads/1/3/1/0/131070523/9514759.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/fitbit_flex_3_straps.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/jgggjbX/warzone_season_7_meta.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/juvuraguvutoxif/appetize._io_free.pdfIn PDF document text
    • http://bitines.myartsonline.com/56757115439.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/23795966065.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/sakubofaz.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/catalog_ikea_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/lady_or_the_tiger_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/bringing_them_home_report_54_recommendations.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/nervous_system_quizzes_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/89894145318.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/tazojaziranoget.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_off0000dd5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5E 5396 bytes
SHA-256: a95acb162d4692342c40d74c08f7b8b68e8e0ec34878576bb125b409309646d5
font_01_sfnt_off0000efbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 10184 bytes
SHA-256: a354faf63a39fb91c64fb39b980047d6bf625eca7379adc130007ee1e1fe5e68