Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f2e6162ef2cd8bc…

MALICIOUS

PDF

54.0 KB Created: 2020-10-31 17:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 5b1cd777d0d57b8f6fa98884e86cf56d SHA-1: bf2101a023a9f04b6bb983611b42e2c457159567 SHA-256: 4f2e6162ef2cd8bcbc4cdd8df639c3c28af5aabadda0cd1e17b7f2688dc647a4
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.cc/123?keyword=honeywell+hcm-350+near+me In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374373/normal_5f8d06fa8508c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5f9d65fb1f28e.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/1/0497/5555/3951/files/catholic_school_girl_costume_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/nodamoxajenoropepefeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3337/0529/files/77521291497.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/french_direct_object_pronouns_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/jesus_de_nazaret_papa_benedicto_xvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8222/8936/files/96797540733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f5033e0-d7f7-48a3-85d0-86db26e90b56/jolesir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3427/4723/files/waxobaxeriraxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/1590/3898/files/buffalo_hard_drive_support.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/close_reading_annotations.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/bukhari_hadees_urdu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/5381/7252/files/libros_sobre_herramientas_de_calidad.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/96978044861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8099/7782/files/the_essential_peirce.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/114f5055-8432-4b50-bf27-1fa0f1e33b6c/95320067251.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_off000093c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C5 5480 bytes
SHA-256: 0976045bceeceec5109f9263c48de6c4d34f409b98bb65d335448b2531c521eb
font_01_sfnt_off0000a659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA659 10824 bytes
SHA-256: 685ada1af36ef3ea4ebf2102582c32110a1522ac05a974f68edd0e624b42df68

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