Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba617cbad93f2eda…

MALICIOUS

PDF

41.9 KB Created: 2020-11-05 20:48:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 65f91c2f59651c83ef0bb13e87940d37 SHA-1: bb78d6eeda92042989354e849fd2c7b8621e424f SHA-256: ba617cbad93f2edacbc8f277358ed2c860b526ef31cc880e47c195f88a1b726a
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=ascot+keyhole+scarf+pattern PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413969/normal_5fa2e78cf3430.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_5f88c1c5c5339.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f87199be5126.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385631/normal_5f960288f3e9a.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/ba5f36a5-76aa-406f-8836-3b827f8f68df/remusikowanozanitamijena.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f7102f-485b-47e8-abfc-9efc24967038/opengl_programming_for_the_x_window.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/91597593073.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/bivalvia_adalah.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d278958-2cde-44a5-acf0-2bd5819af5e3/87069508741.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/64941420565.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_off0000658f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x658F 5260 bytes
SHA-256: f44ff9817515c8d1f644cef45a0f82c4d4d9d2bbe21cb136a5aa862b08968966
font_01_sfnt_off0000777b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x777B 10372 bytes
SHA-256: 76dfbfc4da790c2134167215bebf85a000abf320afff5f1abd9cb9a092ce381e

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