Malicious PDF — malware analysis report

Static analysis result for SHA-256 3542b6904a68a29f…

MALICIOUS

PDF

39.2 KB Created: 2020-10-31 08:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 1e9643df0ed3ac4120adc9f333296ec9 SHA-1: 3fd71865622ae2417d78f6afc857f794d46161c0 SHA-256: 3542b6904a68a29f53fccab471d947f7e4fd488a8bf799bebe7efa9bbe0b9a70
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.link/123?keyword=pioneer+training+school In PDF document text
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/ziwasewe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428043/normal_5f9b78df4bf6d.pdfIn PDF document text
    • https://sazaxadapu.weebly.com/uploads/1/3/4/3/134330736/lexasobibaro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418167/normal_5f9b1bb3b5893.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/9be49eb89d1b10.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005d6e.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005d6e.bin)
    • https://uploads.strikinglycdn.com/files/6b1511e8-f025-4d16-891a-f3fd807666be/disemibekufix.pdfIn PDF document text
    • https://s3.amazonaws.com/zategafozasiru/best_book_for_c_programming_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/6522/5628/files/19744247644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c9bb2b6-2409-4d4c-b194-65f1d86b82a8/multiecuscan_license_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/95370868199.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e26b4b1c-fece-46a7-b213-2d5a112493e7/49195047008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e90c0c3b-a713-4078-b5c4-3a7ea49523d1/wilivage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec344d39-53a3-4652-a4d7-2890b4b97f62/65564656870.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 extracted file (font_00_sfnt_off00005d6e.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D6E 5060 bytes
SHA-256: 95440caf70fa996a91803d36909de1693273a0bcb7bed1c4dbcacc3144341d05
font_01_sfnt_off00006ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA1 9948 bytes
SHA-256: 184dece515d74ae62579153ae29e9e0419a236f30cb17cd35536fd640669e432