Malicious PDF — malware analysis report

Static analysis result for SHA-256 055079d5a47472a0…

MALICIOUS

PDF

40.2 KB Created: 2020-11-07 07:06:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 8d702176362569cb53e83e676c275ca5 SHA-1: c465d446782762f32924da4c0563ccd29318080c SHA-256: 055079d5a47472a0d29a0b2de8a471475adb11ef14a68516006115a0ad24b418
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://traffking.ru/aws?keyword=weight+watch+belt In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370791/normal_5f8c8a72196df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_5f93f22b63584.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386354/normal_5f9934984bd0c.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/jafujasiwetid/isle_du_bois_map.pdfIn PDF document text
    • https://virinumit.files.wordpress.com/2020/11/todawemutu.pdfIn PDF document text
    • https://jasobegofur.files.wordpress.com/2020/11/veruzavizotarelurib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9de10553-6809-4abb-99bd-3758ea6489be/tokimeki_memorial_girls_side_premium_3rd_story.pdfIn PDF document text
    • https://s3.amazonaws.com/zomuzigo/teloxosegojugefotixe.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/25402725580.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5083f07-c467-45eb-9563-79b32ffa0cc2/cbse_syllabus_for_class_12_biology.pdfIn PDF document text
    • https://mubovekoj.files.wordpress.com/2020/11/formato_plan_de_mantenimiento_preventivo.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/39027267909.pdfIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/band_knife_cutting_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/reference_angle_calculator_pi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6074 5032 bytes
SHA-256: ab9abe4b4aa69a0e9e0c777f03eee230848c09266293c91038b4f0a8668e6e75
font_01_sfnt_off000071b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B5 10144 bytes
SHA-256: 394f01aab03880cc5c2f78522ef11bd446f35dafd0bfdbe8709aa5e413716627