Malicious PDF — malware analysis report

Static analysis result for SHA-256 d68c0e43839fd519…

MALICIOUS

PDF

38.4 KB Created: 2020-08-10 17:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: fe1a852e6c980b18fade77681b13d8b3 SHA-1: bc127f856a79c4029edbfbdbff1d026111d26fa6 SHA-256: d68c0e43839fd519383e9b1e4f8973742d40c632a6920b20b037c5f9adfda8de
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.com/pify?keyword=cutting+and+tailoring+books+in+gujarati+pdf In PDF document text
    • http://files.treatsandtitles.com/uploads/1/3/1/4/131408465/jibuvenifu.pdfIn PDF document text
    • http://files.jacobs-ladder.co/uploads/1/3/2/8/132814463/vivizidevukug-gipupivaxusudu-dukumemenowak-tunoz.pdfIn PDF document text
    • http://jamoroz.lifestylebydesiree.com/uploads/1/3/2/8/132814930/85beb897ed098.pdfIn PDF document text
    • http://files.davenportband.com/uploads/1/3/2/7/132712129/2725650.pdfIn PDF document text
    • http://files.unifiedtaekwon-do.com/uploads/1/3/1/8/131857494/gonemoziwoku.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/1/0430/8362/8697/files/pesamibemodijemowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/applied_economics_k_12_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9969/2958/files/gajaluresuxixiwuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/business_communication_essentials_6th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5769/2320/files/26705735307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/50280357724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8463/5544/files/89941244664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0407/3880/files/95104322325.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4742/6965/files/3751779969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/48254944843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4357/7256/files/jekonujedegupejut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2511/2988/files/34221397317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1011/2163/files/concise_paediatrics.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_off0000579e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x579E 5396 bytes
SHA-256: 27a6581ad32cefa79a668d9245af44a24ac1b54cd1d4df36ee8e5e5ab109854b
font_01_sfnt_off00006a02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A02 10128 bytes
SHA-256: 5d32e0e7eb9e3dcc31af71f836e9d72f277b378d278d9b43b2c115f8c5fef894

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