Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9acabffe1be2cff…

MALICIOUS

PDF

43.6 KB Created: 2020-11-05 22:32:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-02
MD5: e1f82d32cb1cbc3c408365a316b19ec4 SHA-1: 813abf095e18830c94444bea7074cf521d4dd800 SHA-256: d9acabffe1be2cff75c584fe0fb6c89391f0d49163c19017987de2f965f09884
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=ipad+pro+manual+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415974/normal_5f9fdcac2fd2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_5fa23e7a053b0.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/87579896191.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374957/normal_5f8ecf560b003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366652/normal_5f9f42dfd0ab2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_5f90fbef65d42.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000581a.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000581a.bin)
    • https://uploads.strikinglycdn.com/files/caaad76e-27ec-4808-a13a-6ffe6042c93f/39127605335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bd419c2-9f2e-4ce8-a956-f54c1a9b2f72/83623273171.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339857cf-55f8-4402-9665-19978b9c3bf7/kinaguvufubolopinojates.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 extracted file (font_00_sfnt_off0000581a.bin)
    • http://dejavu.sourceforge.netIn extracted file (font_02_sfnt_off00008c7b.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_02_sfnt_off00008c7b.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000581a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x581A 5036 bytes
SHA-256: 42d47f651c0c53f77d9ffac8e612ebfa1368a75f500777c3fb47103276f56af6
font_01_sfnt_off00006922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6922 10268 bytes
SHA-256: a7115294fae2ffc84781efdb19c9c61bbba2e72588228646cc6e78daaeb6f04e
font_02_sfnt_off00008c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7B 16164 bytes
SHA-256: d221d0159003a16260aa815ef58ee88dfb02c7586eb2c734f5870684c3082db7