Malicious PDF — malware analysis report

Static analysis result for SHA-256 5df9ca3f49b9ce79…

MALICIOUS

PDF

43.5 KB Created: 2020-11-09 14:03:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: cc683f4391a2f158322cf9359334868a SHA-1: 948d78a9d11ac85029f05816bfc4d728ffcc33de SHA-256: 5df9ca3f49b9ce796787cbc23919384df7919e5f7466c86ae122a5541e10776c
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=sprint+direct+connection PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369900/normal_5f9db3871643f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_5f95e80e0276d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_5fa5bb3c014ca.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/55108f5a-92d0-418c-9c42-be3bd5c5104b/14762155717.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/xofafawo.pdfIn PDF document text
    • https://s3.amazonaws.com/fopalew/phimbathu.com_thai_lan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721986e9-0e8a-4e11-804f-7276e6d95b0b/ore_oru_ooril.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/426ef5f6-afa4-4151-9851-2359a4bfe624/fimometegexagaxomotixutun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6699dffd-db11-4f04-8987-ee3125f153d6/zedilibep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c5727e7-6efc-471a-963a-8fc7ce6c269f/wayne_county_high_school_football_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/craftsman_t225_lawn_tractor_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/different_parts_of_a_circle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vibove/26174418852.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a78ad5d-40e4-4858-8b5d-735205276099/borotugax.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000573c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x573C 4752 bytes
SHA-256: a96016978d3047cdb70e3cd6fb9f61659906b437557b792709643060b58f6496
font_01_sfnt_off00006770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6770 4584 bytes
SHA-256: 0a176ee4ffdcccacea5cbeb01b4d2294b7f9ad809c9278f5bfe4e227e0f44be6
font_02_sfnt_off000073e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73E3 13412 bytes
SHA-256: d64468017c7cfa6c0c169945a9b50407a5fbd2530babc1c1b2f576f6bbf201d0

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