Malicious PDF — malware analysis report

Static analysis result for SHA-256 730d26a64bcf614e…

MALICIOUS

PDF

47.5 KB Created: 2020-11-08 10:54:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: a46a935f6ea3345c7df0b6bf12cbc9ab SHA-1: bced8383e808cb9a8e759fbe4fc0ed6f1ffd919d SHA-256: 730d26a64bcf614e87153cfaca195b7d73b2efb135996b707d2493eb24614d27
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://traffking.ru/123?keyword=sonic+mania+sprite+files In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409258/normal_5f94458985471.pdfIn PDF document text
    • https://donikigegetala.weebly.com/uploads/1/3/4/3/134311768/3a42daff244.pdfIn PDF document text
    • https://robubafo.weebly.com/uploads/1/3/4/5/134588337/7896829.pdfIn PDF document text
    • https://muvesajaduxu.weebly.com/uploads/1/3/4/0/134012660/mutozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5fa6ffe631b01.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/10c5f0b2-76c9-4a68-bbc5-db551afd678a/lapineruwawaguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e47ee5ca-2cff-4856-86ec-7387957aff0d/dobifezulefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5dad21c-902b-404e-99aa-66094a80e6cd/31460243801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff2917f3-2132-4ac3-b7dd-267f907f06e5/vapabilovigimavinaxav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/463dfc23-aa0b-4da6-b577-cd279014f977/87575278409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/962c5c67-cb1c-4a83-a291-956af9d90a4e/47231133265.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000659e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x659E 5264 bytes
SHA-256: 2e0779efcfb45f292285629e5139cdcd3b33071f8bd742398ee1382682d9caaf
font_01_sfnt_off0000776e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 10572 bytes
SHA-256: 828d52437cb43dc8d64f838f0eb5b6cdbdf6117af0a718f52d55342ad90c38ae
font_02_sfnt_off00009b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B94 16332 bytes
SHA-256: 91c92fab729f552433758475f1ecf6a366c66c74ae6b4dd9e31a9a0100f2b42c

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