Malicious PDF — malware analysis report

Static analysis result for SHA-256 89baa06a4b99de60…

MALICIOUS

PDF

42.1 KB Created: 2020-09-30 15:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6408167535feefebf8ada9909fd69b28 SHA-1: 69ec31d99c0d00d176f4198928e91a0c880ae55a SHA-256: 89baa06a4b99de60ba5f7b77a5bbcb462337163a3487c147464729bebc5d37a7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.
  • 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/strik?keyword=thinking+skills+critical+thinking+and+problem+solving+book+pdf In PDF document text
    • http://files.hfchristianchurch.org/uploads/1/3/1/0/131070798/980c80ee5.pdfIn PDF document text
    • http://files.victoriaghairdesign.com/uploads/1/3/1/3/131398419/001b93.pdfIn PDF document text
    • http://files.holidaycottagediss.com/uploads/1/3/0/9/130969573/6239985.pdfIn PDF document text
    • http://files.stdavidscarrmill.org/uploads/1/3/0/9/130969445/punaf-vopugigul-jenuxixupejo.pdfIn PDF document text
    • http://files.juliasartpath.com/uploads/1/3/1/0/131071063/vorakebibolokeg_bifinedejima_safazidug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/92213278956.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9727/6064/files/83058881225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5159/7480/files/dna_model_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2601/4620/files/gloucester_township_schools_reopening.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1184/5539/files/legal_transcription_jobs_from_home_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/tubaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6042/7928/files/jogaluwudozutute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8391/0559/files/basic_photography_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/3587/2667/files/ups_air_waybill_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc2e8ebe-0cdb-4687-9e90-deb1476de4fb/kujawejomiwazusunakoni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f5dc83e-dcf5-40b9-a1b1-aeae5e7f1c3f/zivodakogenad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3c5d11a-ec42-4134-97b1-cf6d2805bfe3/pebijarisobiluv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baba84f1-15b8-443f-8f1c-982a619c61fc/62587844907.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_off00005763.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5763 5572 bytes
SHA-256: 4cd8aea44c3c065acee853fe2ec125dbab3cd011024be5407ad985c092db2432
font_01_sfnt_off00006a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A1E 10084 bytes
SHA-256: 1a26154a58bf0e9e77b9ed1a3bc3c830938720798465103fed46d9f0575a12d4
font_02_sfnt_off00008c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C8D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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