Malicious PDF — malware analysis report

Static analysis result for SHA-256 35e98a7980d75fe0…

MALICIOUS

PDF

48.1 KB Created: 2020-11-09 07:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: bc56ac87eaba5438a84fb48fa3b1b8a5 SHA-1: 87391127c64e4566d962c88996adcf5845054ce0 SHA-256: 35e98a7980d75fe0ebe1e0607fd3fc476e90d3e3868c4aede6dac433223759e4
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://traffking.ru/aws?keyword=fairfield+county+school+district+ohio+number In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366331/normal_5f8763f3b0dbb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387565/normal_5f95d9be66853.pdfIn PDF document text
    • https://fizolapojola.weebly.com/uploads/1/3/1/3/131383549/lumopuwabuvafikex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_5f8d42182ac5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413702/normal_5f95ef34f39f0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4b69c406-10fb-46b8-9b3a-159bf1b069ba/the_developing_person_through_childhood_and_adolescence.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/gezanilajuw.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/67013612828.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/vixavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a6ff651-fcbd-4559-aae3-9b6144b95911/rilikogakorexuxiredatoju.pdfIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/41146093293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49d637ba-7253-47ec-adf1-8d1b1b2b21d9/five_letter_words_starting_with_el.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1903b0dd-83e6-4430-99a9-7c5c203ef6e6/pekejotaxu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9188c640-47da-4092-b614-6167f68e6992/92317669947.pdfIn PDF document text
    • https://s3.amazonaws.com/gavexilatuvitaz/scholarships_in_sc_for_teaching.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBD 5340 bytes
SHA-256: 001cc258884f15d3077571428cd36332654bc5f06cee16a5bc4497a30abc4ebb
font_01_sfnt_off00007fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB1 10888 bytes
SHA-256: c9fdd2a07b52cc22e43bf598a1bf2f1c2a4645aad89c506b445917120e817be7
font_02_sfnt_off0000a484.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA484 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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