Malicious PDF — malware analysis report

Static analysis result for SHA-256 44335041f74966aa…

MALICIOUS

PDF

51.4 KB Created: 2020-11-05 17:54:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ef1e6233cbc4974efe2ba0982e468ce6 SHA-1: 5711f8999ae6985e2fee1f9ec38f660ab9f50a2d SHA-256: 44335041f74966aa12500673cffcc9900c0c2889cd804838252e62f5ca687728
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/123?keyword=consent+meaning+kids In PDF document text
    • https://fufajogaxofamu.weebly.com/uploads/1/3/4/6/134627879/600922.pdfIn PDF document text
    • https://wawukonuxoni.weebly.com/uploads/1/3/4/0/134095992/sosofogeg.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/vonolifuji.pdfIn PDF document text
    • https://doxeduzawixufak.weebly.com/uploads/1/3/4/3/134383044/xaben.pdfIn PDF document text
    • https://gibitiwatu.weebly.com/uploads/1/3/0/7/130776060/4046528.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/company_profile_design.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46c0bce5-6708-4f41-8e9d-f4ae88f43e7d/35133729776.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39dcfdd1-7b1d-486a-bdfb-0ed5ecd05542/kimikukafafezazavoradij.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/kenya_census_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e306d6c3-eae6-4f08-89ab-bef94d1505f9/ropimefiwosujewuwofimusul.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/506_assignment_answer_in_english_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/307e5773-8b58-445c-858c-0d86b7518bab/molukogexabur.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_off00008bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAC 4984 bytes
SHA-256: f189670a29da588bc05f0aabfdd1da6f03d92c1b6704e538a4186d4a2ce1eef4
font_01_sfnt_off00009c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C8E 10876 bytes
SHA-256: 7c8abe0e94d5e6d61a544fb265d0b42493ffd22faf275058c922088247ecee3e