Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6c43391e99de4c…

MALICIOUS

PDF

39.2 KB Created: 2020-10-05 01:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ec6fa2421ebc341596419a78fee6f96d SHA-1: 86f609c5fdf74f77072d4eb86cfb4f8e9c0eab02 SHA-256: 9c6c43391e99de4c8ed8e04bb4909c0be07c0e02cff4e696d3b645124f6970b5
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=john+lennon+jealous+guy+piano+chords In PDF document text
    • http://files.jacobsden.co.uk/uploads/1/3/1/3/131398182/bobexag-xejoteborugase.pdfIn PDF document text
    • http://files.auctionsgenerosity.com/uploads/1/3/1/8/131858791/komapusabusa.pdfIn PDF document text
    • http://files.raiareads.com/uploads/1/3/1/4/131406563/sivamex.pdfIn PDF document text
    • http://zafibal.navarrehigh.com/uploads/1/3/0/8/130814448/1952474.pdfIn PDF document text
    • http://files.mvlmc.org/uploads/1/3/1/4/131453402/c4fad21d6964798.pdfIn PDF document text
    • http://files.dg-machina.com/uploads/1/3/0/7/130738603/tofunaduwawe.pdfIn PDF document text
    • http://files.ecp-wi.org/uploads/1/3/2/7/132740623/7902328.pdfIn PDF document text
    • http://files.ypsummitvt.com/uploads/1/3/1/4/131438217/5719207.pdfIn PDF document text
    • https://site-1036637.mozfiles.com/files/1036637/lejoxasuzugu.pdfIn PDF document text
    • https://site-1039730.mozfiles.com/files/1039730/18877548022.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/paul_preciado_testo_junkie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/impulse_response_function_calculator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8661/8017/files/63087010435.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8299/7141/files/types_of_chemical_reaction_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0185/9224/files/wibuwebibiduzupuxa.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_off00004d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D15 5304 bytes
SHA-256: cb7e0629fef7e39b551c8110eeeeba12dd5d3c389fdadc26001ff625e6a3a36e
font_01_sfnt_off00005f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F14 9980 bytes
SHA-256: d70d08f93e1e660e8065d4ec594a00b78ec8dee7e2e0b5329fcee3d5ef9b7970
font_02_sfnt_off00008134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8134 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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