Malicious PDF — malware analysis report

Static analysis result for SHA-256 87453b76961ecf54…

MALICIOUS

PDF

54.9 KB Created: 2020-10-07 12:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 20fbf3e6e89fdeecc122f108a9d3d9d1 SHA-1: 6958355904aed3397d15bb019d59430c78f2b6a8 SHA-256: 87453b76961ecf54e9ffd00eaeb60135ffcf73e0b553c7a215a5ee5963a61128
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://ggtraff.ru/pify?keyword=axe+or+old+spice+body+wash In PDF document text
    • http://xulim.meraglimholdings.com/uploads/1/3/2/3/132302782/wegodut-rozotonajoso.pdfIn PDF document text
    • http://toxipo.legacycaengineering.com/uploads/1/3/0/9/130969690/f2a1bd.pdfIn PDF document text
    • http://files.sophieewalterr.com/uploads/1/3/2/7/132740693/kirurifidas.pdfIn PDF document text
    • http://files.jweinsteinlaw.com/uploads/1/3/1/8/131856516/9b59d311de50915.pdfIn PDF document text
    • http://files.missyjkennedy.com/uploads/1/3/1/4/131406273/tegipesiritubi-kirito.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://uploads.strikinglycdn.com/files/d550c9bb-4d08-4dea-b11e-4a1b70cef02b/72006812383.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33068eaa-b9be-473c-855f-b58847b5bd34/33060558136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cba9fff5-86a5-439c-99fa-53e4491b1a6a/siraz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1181e92d-f742-458c-86b0-f9808f82ea42/2229619089.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bb93ef4-69b7-4b07-ad57-814585f7562d/seradelojepixigusidigubo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/04007e38-3f4c-4007-984e-4b74ad49d90a/xatenalojinuzen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6b0dc51-4b9e-47b7-be7c-72eb61648a86/65934986948.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73c63009-4aa5-4d86-b2ef-12d7db757e84/pisagusumubofejavidi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b27439-4dd5-47b8-b4a5-2b8a1d08734f/mulawolivenog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1c6000a-77ff-4ae0-9dfd-f257cdf0b551/zozaj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8261 5156 bytes
SHA-256: e9c2d8d6e0849e6c523a5b981eebce59f53b06a1bce0bb7d9114d35366b47cdd
font_01_sfnt_off000093fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93FA 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00009c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C88 10252 bytes
SHA-256: c94a05cbbcc0f75dfa92bf6b5a04ff3274dec65b0e7080830e6a659d88ad8cab
font_03_sfnt_off0000bfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFA4 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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