Malicious PDF — malware analysis report

Static analysis result for SHA-256 37d2754edbfe02e3…

MALICIOUS

PDF

69.4 KB Created: 2020-11-09 02:00:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 696aa2e30570366d2c5c2c40672d9687 SHA-1: 7eff138a296bd8f2058e3737ab6b6e367456f3c2 SHA-256: 37d2754edbfe02e3192afc7663ad5ad2bffc67e59b679222b5b86949cd2ceb36
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=swtor+juggernaut+tank+bulwark+vs+pummeler PDF link annotation
    • https://zavebunerug.weebly.com/uploads/1/3/4/3/134358754/528d2b630.pdfIn PDF document text
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/rekin_vesawevegona.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/aea9c4cc-a091-4750-8c5a-da0957ed0eba/26981532261.pdfIn PDF document text
    • https://maxekodu.files.wordpress.com/2020/11/42525849365.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01857337-3b4e-4307-b8c5-0a634ee75ec7/18757050739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d81a62ce-011e-4183-a50d-ad69a2a762eb/72905429333.pdfIn PDF document text
    • https://ralibemizavo.files.wordpress.com/2020/11/definicion_de_angulos_alternos_internos.pdfIn PDF document text
    • https://gavorud.files.wordpress.com/2020/11/metodos_e_instrumentos_para_la_recoleccion_de_datos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21e845ac-0ddf-42ec-8873-ce7fb019b51c/60346660602.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d3d5ce8-f702-41c2-90e6-2b174be5453f/3647986139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b16d4fe-12da-425d-bada-c2d7cb1155c2/the_division_survival_dlc_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a31cb5-bba9-4e71-b4f9-dd8d89e23c51/pac_12_schedule_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922b6f30-aa87-4ca7-93e3-4b888a38c665/59442127623.pdfIn PDF document text
    • https://fidunonip.files.wordpress.com/2020/11/8625666511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4bcdf3c3-e702-43dc-9747-5b5aeafe1798/17398248438.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA52 5676 bytes
SHA-256: 917300e6ca3381fabcef529feeb145cbdf70f2e0b158d69f824b7149414a2bea
font_01_sfnt_off0000cda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA7 10936 bytes
SHA-256: a4e28549348f6cbe9c032ff981c04621aade17a7759fef83c80c24ee2cf538d1
font_02_sfnt_off0000f34d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34D 16060 bytes
SHA-256: 3a2bb6651a5ad642813d1e324805fe83a688734d44fd23e014c0665a2602df32

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