Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe01739f3a03294…

MALICIOUS

PDF

42.1 KB Created: 2020-09-30 08:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 6157f40d71ac0b11d62038f7fc0fda83 SHA-1: 79bf2f87d28d59606b6116d3ec7c16f77cdc42ff SHA-256: ebe01739f3a03294a8e7d8cc91e4a276a8a9dc5dc84034a93043a3b87417b845
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://gettraff.ru/strik?keyword=build+your+own+pc+do-+it-+yourself+for+dummies+pdf In PDF document text
    • http://gowevesuk.envchemgroup.com/uploads/1/3/1/6/131606349/1247702.pdfIn PDF document text
    • http://files.hprcsc.org/uploads/1/3/1/4/131437784/silepilulasefig_gejagunasatevud_lajew.pdfIn PDF document text
    • http://files.carriagehousecinema.org/uploads/1/3/0/7/130739379/dunadi.pdfIn PDF document text
    • http://vudubuw.ryandawalt.com/uploads/1/3/1/6/131606577/fananexinagomis-levejovaf.pdfIn PDF document text
    • http://files.oscarpalaciosarchitects.com/uploads/1/3/1/8/131856279/aa1708e5a5.pdfIn PDF document text
    • http://files.cpatrickproctor.com/uploads/1/3/0/7/130776330/7eed84a0a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7341/3032/files/58390291039.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8878/2236/files/saxon_calculus_2nd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5731/4983/files/mepomelipinikujeloweg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1939/8294/files/car_parts_vocabulary_word_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6743/9259/files/tufumasekizajomovuve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8883/0873/files/gomuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nenipuwewof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9207/3895/files/dabitol.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_off000065a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65A4 5364 bytes
SHA-256: c1bfab2c6766814df4940f6bdf35c13427549340cfbf5f5b5a689ba1f19e5f0f
font_01_sfnt_off000077f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77F9 10272 bytes
SHA-256: f3abee0c04a9de09fa92f44e049127db36b08bf0d70bc8979d98e373f3ed25e0

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