Malicious PDF — malware analysis report

Static analysis result for SHA-256 963e44fd48ec3268…

MALICIOUS

PDF

57.0 KB Created: 2020-10-03 19:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: af36a5f36f617d73fb230a862d454315 SHA-1: 2bd641022e0ddfb9f9d07d9ef1261780c1fe88d0 SHA-256: 963e44fd48ec32685de82f0f6320eb6cf9c647a02eff3b49ecfc994ea05d75cf
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=proposito+de+vida+yokoi+kenji+pdf In PDF document text
    • http://files.missionnorthmi.com/uploads/1/3/1/4/131438058/jedopirifowenol_kesitu.pdfIn PDF document text
    • http://lawoga.ne-workspacesolutions.co.uk/uploads/1/3/1/3/131383791/kifusemexub.pdfIn PDF document text
    • http://rukagabo.crosstrianglewildrags.com/uploads/1/3/1/6/131636612/d03f27d3.pdfIn PDF document text
    • https://site-1036962.mozfiles.com/files/1036962/31312397377.pdfIn PDF document text
    • http://files.odmont.com/uploads/1/3/0/7/130774979/gafuvoputew.pdfIn PDF document text
    • http://files.adamsbiz.com/uploads/1/3/1/4/131452735/kilunupaxivejanedu.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://cdn.shopify.com/s/files/1/0484/6973/7633/files/most_common_latin_words_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/7019/3569/files/58471325970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2452/3159/files/7410906153.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6151 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off00007236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7236 5096 bytes
SHA-256: 88cd95a5b6e2c8f1b24ff68e08c95fb013882e135b3d9e1104a679e46caa4163
font_02_sfnt_off000083a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A1 1932 bytes
SHA-256: 4aa063a26bd9e70ad0d04acb797bb2078f152c78321be1114478748fdf4fbf58
font_03_sfnt_off00008ce3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE3 11232 bytes
SHA-256: c3f684ee49c6221314b67e43608afaee80a4a98745edae04315e3ec9a18ffb69
font_04_sfnt_off0000b188.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB188 16076 bytes
SHA-256: d286e8b4d1cdafc5f769987bdccf7a6368ad55d0d3b8f98fd56bc2ae223999f8
font_05_sfnt_off0000c631.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC631 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2