Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbc7333bef24b79f…

MALICIOUS

PDF

43.3 KB Created: 2020-10-02 14:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 19aceb7498bcb88101df2dcfb46ec6bd SHA-1: 78ccdb696fb837045b9b5831d57970862ae62b80 SHA-256: fbc7333bef24b79f701911a091857df00ffa089cd8e25ed9343740fe22c472d7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ttraff.club/pify?keyword=algebra+1+chapter+6+test+pdf In PDF document text
    • http://files.thecareerwomansmap.com/uploads/1/3/1/6/131606179/1274368.pdfIn PDF document text
    • http://files.caribbeantrips.ca/uploads/1/3/2/7/132712325/38769cd32aa9479.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/laxonapitivefar.pdfIn PDF document text
    • https://site-1036939.mozfiles.com/files/1036939/94600763413.pdfIn PDF document text
    • https://site-1039656.mozfiles.com/files/1039656/zovalobataligesomizezokav.pdfIn PDF document text
    • https://site-1038955.mozfiles.com/files/1038955/jusisupa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9262/1978/files/37168569882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2892/7896/files/bowuwesorepowubasiwifeni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7523/4720/files/geometry_regents_june_2019_answers_explained.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/0358/3125/files/5072142679.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/dungeons_and_dragons_5th_edition_monster_manual_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5565/1743/files/ledivobedupowunozorixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8433/2710/files/70051825232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0084/7780/files/bifizefutamijujejixero.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_off0000692d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692D 5752 bytes
SHA-256: a53f80558c87356c4ef989901a0ec355d0e168e84020ed2f237e819b9fe8e2c7
font_01_sfnt_off00007cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBF 10588 bytes
SHA-256: 22468d05e0eedc98eac79aa5efe5be71e268868a8ae770b9d2774510ef9a396f

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