Malicious PDF — malware analysis report

Static analysis result for SHA-256 84119b56d3d90f78…

MALICIOUS

PDF

43.9 KB Created: 2020-10-26 08:23:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 38faad6ea0bb2c6a4a93ef73f4b1e556 SHA-1: a9650ccea24e9f285c847695d4f6e5f4bfed89bd SHA-256: 84119b56d3d90f788b0d55f8cd285da6deccde25576542cf44be845030a950d3
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://cctraff.ru/aws?keyword=functional+requirements+specification+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379973/normal_5f94a3c307850.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372719/normal_5f8aa02690c0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365525/normal_5f86f4dbbe88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379485/normal_5f8d863f621f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382197/normal_5f8c0e7ce6bfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381094/normal_5f8b56b0bd0c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006c07.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006c07.bin)
    • https://s3.amazonaws.com/xezonijida/algebra_1_textbook_online_mcdougal_littell.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/fejomaniloz.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/berliner_platz_4_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/aciduria_orotic.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/kosab.pdfIn PDF document text
    • https://s3.amazonaws.com/zufojadibi/tibumopivutebediraloki.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/aswath_damodaran_valuation.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/68657760349.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/tunudojipejawukikudopefow.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/analytical_skills.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/16652566795.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/16083443028.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_off00006c07.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C07 5384 bytes
SHA-256: cdf1d5921a1aaf29ebe80d66395d987506a88522c2860bacd58d345a883706b2
font_01_sfnt_off00007e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E35 10444 bytes
SHA-256: a2f2bced3d8a71b520228f6004a34de73f32a0a01f523cec190753717f4c300a