Malicious PDF — malware analysis report

Static analysis result for SHA-256 42a2575d1fad531d…

MALICIOUS

PDF

52.5 KB Created: 2020-11-05 05:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 140474fa88c7af8b935acf8a6b2509b7 SHA-1: 0f47c9972a1df7e533c358620321efae3904ada3 SHA-256: 42a2575d1fad531d6291c12a88b0aa296c5c26f2f67dbe9dd52629ca810bf1c3
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://ttraff.me/123?keyword=the+art+of+communicating+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409411/normal_5f96ddfdc9db1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383131/normal_5f94d9948bd43.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/parogafagelujagofo.pdfIn PDF document text
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/zezuba.pdfIn PDF document text
    • https://xezinazilasiza.weebly.com/uploads/1/3/4/3/134319357/vededogetikis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f9e240025125.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/falepibeboxek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f899b5064f7b.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/miwolezedubujoz/rosasikodozujan.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/akuntansi_keuangan_menengah_2.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/srs_for_book_bank_management_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/4973/7115/files/genedogudezowumunejeki.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000640a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640A 13184 bytes
SHA-256: 4822087755a973476e265a8d1805bb21e7b5648acfe872101f8a8bfb1efcd28f
font_01_sfnt_off00008e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8E 5308 bytes
SHA-256: 58569c8ffe71580d8a2fc85493a3c3fa576d8fe79d524451f73cd8e68052c8ff
font_02_sfnt_off0000a073.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA073 10060 bytes
SHA-256: fbd6e28b1d996b0226e47c8ea5a3f2cd10bb0aa847ec649cec5a72d73cedab5a

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