Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a0fbe0876161eab…

MALICIOUS

PDF

41.8 KB Created: 2020-11-07 00:00:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 915c070ee93ffb0e4945f9a9da6cced5 SHA-1: 901f9a11a6cba3791a6b38edfcba30c5e2744fa9 SHA-256: 4a0fbe0876161eab817a8af6c21caba14f30f882704973865b0ce03911f13f09
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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://traffking.ru/123?keyword=curtis+and+son+funeral+home+-+sylacauga In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368969/normal_5f8bd3c4aac42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_5f88762c237f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5f91d045b2a22.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420448/normal_5fa275f6f208a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f896aa14df13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368475/normal_5f89327d20278.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/127653.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rezareludufiven-voxodopi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dufakeribeze.files.wordpress.com/2020/11/sopevelezupomakog.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/tatewuxusedigupuvegunixu.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/wavafizilomedi.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/charleston_county_schools_calendar.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_off0000600f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600F 5472 bytes
SHA-256: b341133418b6a560317c41d191fdc69b3a7e9b11e01abcb579848af7c5d78e21
font_01_sfnt_off0000728f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x728F 11176 bytes
SHA-256: 9870d080c8b3de232518a75020e5b96b2648e596839d0daa1d5c5575269e82a5