Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7db3499ebbc5d2e…

MALICIOUS

PDF

41.3 KB Created: 2020-10-26 11:41:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 5a49db8292c48ea41363387b305f60b9 SHA-1: 2338f0b6006d1a53d59c163d1c0272663a27b69a SHA-256: d7db3499ebbc5d2e0c57953f7362cadf95ec709dc9a87f8b7bc2d5753e8f7586
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://cctraff.ru/aws?keyword=bodybuilding+meal+recipes+pdf In PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/nenanofot.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/fibutejugedutobi.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/144058.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/sopakasumut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5f8bcbd44b13a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f8e4e033022f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_5f95f3b24b20d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365594/normal_5f8c6a5b9be2e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369909/normal_5f88ccd5a7ba4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_5f8d27da6b4a1.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000060b9.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000060b9.bin)
    • https://s3.amazonaws.com/toliwudalamem/tesujeli.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/alberto_moravia_gli_indifferenti.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/nubekerasak.pdfIn PDF document text
    • https://s3.amazonaws.com/wajufifenoxuj/egypt_tourist_map.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/acs_child_care_application.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/50712536583.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/remakomexuga.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 extracted file (font_00_sfnt_off000060b9.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60B9 5768 bytes
SHA-256: acaf0b9c9a55683ff39c6143a47c5dbdc9e51b3366ca7dd91e066afcd0a1b6aa
font_01_sfnt_off0000743d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x743D 10644 bytes
SHA-256: 0bbafbd925d040454b006487b4d1ea2b8c9b2027ca07501775addb62fa8373e1