Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e544389535595e…

MALICIOUS

PDF

41.6 KB Created: 2020-11-05 19:51:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: 078820613f447a484498bf0b5a6e1a96 SHA-1: 0832e0a17ff32899a53dc388006fdb93ac8f91a6 SHA-256: e6e544389535595eccc48cf0f908fe20878ba20cb486b15b26dbd133525bfa6a
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/123?keyword=tadacip+20+tablet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370056/normal_5f9a8301e539e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f8f57a7daa64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383807/normal_5f8da9d34f9e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368976/normal_5f8c43d2ef842.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_5f9ae273c2e48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f9de388905ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413019/normal_5f954489c72b4.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/xazarujokemus/pathophysiology_of_pulmonary_tuberculosis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bc090df-11d3-484c-85a3-353d5f6d7626/pogifusezozukakil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c55ead70-2f42-4b81-b4a1-f0b55a3c3d67/17035937369.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36afe61b-ebbd-43e3-b79e-fdc476ea08ce/wamejobitinibuzizenonejem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ceef490-b2d0-4812-afaa-fffbee8114e2/mofagitedoloweg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1781a66a-637e-4b16-a197-cf522887a15e/benixowanalufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46b7b289-77b8-4d32-b5c4-38b85e4d5984/disney_infinity_3.0_feats_guide.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_off00006598.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6598 5156 bytes
SHA-256: 4980b548f5e840ee3980de60960b046827f6a3bed6ca8b72a5f806a42f8d6e7e
font_01_sfnt_off0000772c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772C 10284 bytes
SHA-256: be785d8c66b352841274916df9eae14b5fef3a1e90a47f983e7cf097996c2349