Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd93a1a578590aac…

MALICIOUS

PDF

45.0 KB Created: 2020-09-30 23:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 24b878d992ee9f2d6cf24d6701b2d237 SHA-1: bcae49257480ccd8eff32b5e78867687ef2cd1da SHA-256: dd93a1a578590aac7e2b02f81c8c4a3a6b6d37028abf4f5520eddf14ab837279
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gettraff.ru/strik?keyword=lullaby+of+birdland+noten+pdf In PDF document text
    • http://files.taftmusic.com/uploads/1/3/0/7/130738679/muxatuxekif.pdfIn PDF document text
    • http://dejela.ebcentre.co.nz/uploads/1/3/1/4/131453096/57814.pdfIn PDF document text
    • http://jukemate.4hourclean.com/uploads/1/3/0/7/130738755/595c8.pdfIn PDF document text
    • http://dawedovuv.sweetbydesigncakes.com/uploads/1/3/1/8/131871433/navavomuvenuz.pdfIn PDF document text
    • https://site-1037235.mozfiles.com/files/1037235/niseziromiw.pdfIn PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/4604258883.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/269312b0-4845-43d0-83cf-21578d3bbbbd/76673033145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c7eb993-3908-456a-b2cd-18a85b61dd93/visemokotewo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DFD 5040 bytes
SHA-256: e3f103aa7989e18357da6751a8c57faf86ba0c6afb8c8b4beecdf57cd4d29f89
font_01_sfnt_off00005f39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F39 15520 bytes
SHA-256: 1ea33c645a4dc18482c11359be4aebaedf86c6a0148bc2a7baca174e01acc951
font_02_sfnt_off00009012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9012 16132 bytes
SHA-256: 1dc3e4c0df5ca4cee3a891f28fe896d6b16a951626fb4346f09e4ab97736c5fd