Malicious PDF — malware analysis report

Static analysis result for SHA-256 f210ac125ed39eb7…

MALICIOUS

PDF

43.9 KB Created: 2020-10-15 10:22:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: eb13f6e0d98abdc2174d5ab5e76dce01 SHA-1: e3f794565a9810510a7290a44369666bd1d9d51d SHA-256: f210ac125ed39eb751a8c84c9aa849994b415143186143b62ae2bd8fd8a4fef7
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=academic+performance+of+college+students+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f87b00fac376.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f87d315ce0b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5f876e9cd136f.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/tunitulo.pdfIn PDF document text
    • https://xazapadikud.weebly.com/uploads/1/3/1/8/131871762/6fc94af5b7a.pdfIn PDF document text
    • https://site-1036828.mozfiles.com/files/1036828/kakawepuvaboban.pdfIn PDF document text
    • https://site-1038601.mozfiles.com/files/1038601/vefuzogar.pdfIn PDF document text
    • https://site-1037057.mozfiles.com/files/1037057/kitavimokikakepi.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/4466d964-cd6a-4eea-b5c2-768562332426/jogakufop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b519e98-f57f-4d59-8ef3-43dd1b94048d/24806062918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb968c25-8a30-4f3d-85f1-32cdcd3bc072/96982295657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6020eac8-905a-4043-9462-2a8bf6cd8e35/28032733669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d8c7771-e0ef-4d6e-926c-243543eaa668/32183079251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e97244e-e5bd-4b2e-9258-772b88051035/rijunodibuxuxukutufasum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab59e786-a9ac-46d0-bdff-42460bd2273e/pugozajogeseraburi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/575370bf-ea4d-41a6-ad22-d79606c71554/33394374457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b385db-10ad-43cb-bdfa-2cc29586fd30/76270534741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844b7381-be02-4fe6-a479-e5a51ae0a7cd/lofelinojavavawanodemeguj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa65d42-dabb-4263-a93b-51153ed0ca1e/totutixabed.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE6 5464 bytes
SHA-256: bcedfe77e3f726c4122f6cac942d35f0e244548e0558855c7f7e943f6721e14a
font_01_sfnt_off0000805c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x805C 9852 bytes
SHA-256: 43a23ba46cc3c1e7b2e415e2efc07e0042ac1677fc2005332f9bd89d0efa9e62

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