Malicious PDF — malware analysis report

Static analysis result for SHA-256 b254d7b1c06b1d25…

MALICIOUS

PDF

42.6 KB Created: 2020-10-07 00:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 0045510d95211f9e85d6c788812f3e76 SHA-1: bbf038cba54daf7d8279bac079c7f2f1073dd68a SHA-256: b254d7b1c06b1d25d7a04932928fc606084d3f6f3664ff31c71f7420c8e99382
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://cctraff.ru/strik?keyword=back+titration+to+determine+ammonium+ion+pdf In PDF document text
    • https://site-1041282.mozfiles.com/files/1041282/95607538624.pdfIn PDF document text
    • https://site-1038729.mozfiles.com/files/1038729/57194776396.pdfIn PDF document text
    • https://site-1039224.mozfiles.com/files/1039224/28793691039.pdfIn PDF document text
    • http://wozir.grpfilms.com/uploads/1/3/1/1/131164250/bojaragomanilupem.pdfIn PDF document text
    • http://files.de.com.sg/uploads/1/3/1/6/131606123/nogukowige-fexevoruwazomi-namutali.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/099ac1ac-dd45-44ac-9fd1-9419657c8a64/polanifolur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/588e8795-61f4-4a16-81bd-78618a296ebe/gedosanaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcee14fa-84d7-4a1f-8dcd-810bf5252881/togetonezomuda.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f0356e2-36f7-4241-978c-42316533e12a/27729974632.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_off00005e65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E65 5084 bytes
SHA-256: 142c9f36d3c13b2dafe77cc0d5c0c0cf1b2a2ad5822958bfa3de8047912d73a0
font_01_sfnt_off00006f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F90 9268 bytes
SHA-256: aee6216a770e3ef95127a1ab7c1407caf9a71c5de2d26b5fe8e2638aa10a3457
font_02_sfnt_off00008f3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F3F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230