Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcb02548fdad639c…

MALICIOUS

PDF

71.6 KB Created: 2020-10-23 08:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: e32cf14a52f13284a2e329f02f9f5cf6 SHA-1: 1784fd1f39ebd4442557dae1824ae1c41005c606 SHA-256: bcb02548fdad639c54cc0aae254b1d0c504b855a7447905cfb38f78e0b2c4f36
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://ttraff.club/123?keyword=michelin+guide+seoul+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f8bbfe8ae9d7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4181/7244/files/95771138604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/13338802541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/8905/5910/files/the_codex_sinaiticus.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/5842524590.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/xipixorejosoxujilaxaw.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/tajexenufuxugugep.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/52597383834.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/94576653174.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/cabala_judaica_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/apache_poi_xlsx_to.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/41512061599.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/16457154099.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/gununeko.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/isbn_barcode_generator.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/tefamugulalepojizetaluwis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2154/7713/files/talking_angela_mod_apk_apkpure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5033/5384/files/ryobi_drill_bit_set.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5978/1023/files/bsnl_prepaid_recharge_plans_tamilnadu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7452 25532 bytes
SHA-256: 76a92e52b587715cd078cbdb3650059a1273a45276ad0222b4f48b720f192cb0
font_01_sfnt_off0000bce9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCE9 5176 bytes
SHA-256: 82cfa781e68d98a7f830b3427727af58da81c08cd4a7c16cbf7239444e9d1a08
font_02_sfnt_off0000ce88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE88 13696 bytes
SHA-256: 27641020ecf83bcde6fca600c4ff6d34da3c8f87b2f0d7656670315a7988e630
font_03_sfnt_off0000f9f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9F9 16060 bytes
SHA-256: bb1e7b69a1727d502fa20c27594a44db64609b87a44ae202a20d3a9f6d018624

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