Malicious PDF — malware analysis report

Static analysis result for SHA-256 bacd7dba68fa5160…

MALICIOUS

PDF

57.5 KB Created: 2020-10-07 00:14:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2837ad3d9a011691a478c9e60a0bf818 SHA-1: 9ef4a7c343872c080f66cc3c8e61e840358fd09d SHA-256: bacd7dba68fa5160f7e88dce5dd60e02bb35a4fc8552e76fbb16640e09cac73e
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://cctraff.ru/pify?keyword=funny+dwarf+names+dnd In PDF document text
    • http://files.juliesenf.com/uploads/1/3/1/0/131069898/jeloragupave.pdfIn PDF document text
    • http://pitelufi.cherylsteventon.co.uk/uploads/1/3/1/3/131384609/1cfe52.pdfIn PDF document text
    • http://files.simonpaine.co/uploads/1/3/0/8/130874189/zujexan-zidimikasir-dapozosiwo.pdfIn PDF document text
    • http://files.ten4enterprises.com/uploads/1/3/1/0/131070867/dokizos-vusegura-legogojet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9553df9c-726b-40ab-98b9-dffdb3ff7793/43645917143.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef46fe46-1146-427f-8de6-5d547ff26ca4/31088713939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a09bd26d-a0ed-4c4e-9835-45cbccd1d7d2/67564943413.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/pocket_mortys_hack_apk_2.12.0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/brace_maps_templates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5752/8480/files/juego_de_mexico_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4295/8231/files/541885803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/37671941295.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ebdcd0b-7e9b-4ff6-bb10-375ae0d58fe0/pafoletobutuvigirojo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92b66bd7-ecdf-44b4-bca6-05e2f8a49300/sizudolejewasuxezu.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_off0000a369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA369 5172 bytes
SHA-256: 43da44b5b629342f31eb6ef433ead58650c2fa5d75cc649f3b4022b7c3c582b2
font_01_sfnt_off0000b506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB506 10600 bytes
SHA-256: 28f8c2a29b80c8dc349b46749431f605cc5e7deab0a9a9292fac6489406b4a45

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