Malicious PDF — malware analysis report

Static analysis result for SHA-256 593607f1cf668d5e…

MALICIOUS

PDF

58.1 KB Created: 2020-11-05 15:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 0089528e38fbe3508a633a0fc5154497 SHA-1: 6e2fbcdce8a6dcbce0f93df0a0a7676b19d61e18 SHA-256: 593607f1cf668d5e7c32a555094a3ef3ecaa57ad4969f889d88bfa1e58812d55
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://traffine.ru/aws?keyword=new+common+lectionary+2020+episcopal In PDF document text
    • https://fobaxidoxeg.weebly.com/uploads/1/3/4/3/134356333/75dcd14c72a3.pdfIn PDF document text
    • https://juragubiv.weebly.com/uploads/1/3/0/8/130874328/69cda82938.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394060/normal_5fa0bd8c60b38.pdfIn PDF document text
    • https://jarofudi.weebly.com/uploads/1/3/1/4/131408364/bukogozexa.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/tetazino/climate_prediction_center_maps.pdfIn PDF document text
    • https://s3.amazonaws.com/wixamupelinere/build_me_up_buttercup_ukulele_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/63848189120.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/skyrim_hide_helmet_se.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/muromovogokum.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/18886058255.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000ae90.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xAE90 25856 bytes
SHA-256: c7de9dc362f22202c94f85d7ecfc769994ab1ec3feb407c8eea1ced5b4ede3c0
font_00_sfnt_off00007591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7591 5516 bytes
SHA-256: 10821288fd36a7f68c040d28329cf6fe6509579b439eae462724c1a7cd7e2514
font_01_sfnt_off00008855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8855 11272 bytes
SHA-256: e4cf925dd341f5c4ff4893d84a6938e86e75313cf0f8967a566d4996ee28b217