Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cda4958b425665b…

MALICIOUS

PDF

46.6 KB Created: 2020-10-18 14:03:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 700bd00c4e715a35ad85040bcb4d204b SHA-1: b111ce8fe70cf1cc7bdbae743e8eb282dff75200 SHA-256: 7cda4958b425665b2f82907112303794e8fd98002d2471bbbf02c237d7a66b04
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://ggtraff.ru/123?keyword=car+simulator+games+mod+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f883b9a7d963.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f88ba53be00d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373271/normal_5f8baa345678d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f8b9b9359bb9.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/vaxukekiwurefebe.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/2754962.pdfIn PDF document text
    • https://tumixivig.weebly.com/uploads/1/3/1/6/131636813/3168810.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/xepoxovazetawu-finibe-puvonip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379616/normal_5f8b14582530e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366402/normal_5f8762ed186b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f87237df3282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f89f27ca08d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5f895d4fa4f9e.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/a469ebb0-2a69-44cc-8bac-3edd847a7339/watazofirumufemenevujibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16de2d27-1891-4aed-b2cb-72b7993de770/29610569033.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f6d14a4-7c0f-4591-9d9b-e405101c9fc2/zirasozakozuvib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76f3c989-73bb-406c-b1e1-472b5e173c25/kibejixita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfd25ce-d62c-4b6c-b825-14bde9cbb7ac/buwoxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d182e2d-5267-4170-9b89-e88c9e7c9d31/xitovogiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70ec5627-2139-4cca-96ba-93e2791bdf1f/87632167886.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec8ded9-6e31-4000-9349-cacda6d20273/titakujaxewufuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/ultimate_ears_megablast_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/jifegixewatipexaruvipa.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_off00007797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7797 5248 bytes
SHA-256: 237c32c012db7dd3bff91ad2e5edce46d59b2e8c77e165cc36e843a330138b3c
font_01_sfnt_off0000895a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x895A 10492 bytes
SHA-256: 1b4c94106b2c621e26d55eb6ab51648aed7ec24cc674b1b51ec58f38dcf4e98d

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