Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5721e6a75d2d7e…

MALICIOUS

PDF

36.4 KB Created: 2020-11-07 01:09:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: bdbf8807b6670c93767c448f9e32a823 SHA-1: b3c50f0a732d9ea356152b1422a0dde2cf530467 SHA-256: fd5721e6a75d2d7edd197b3486f114bfe768bb782c78453c269d45d551d0faa0
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/123?keyword=2015+envy+prodigy PDF link annotation
    • https://gewusepisegetu.weebly.com/uploads/1/3/4/4/134492884/vuken.pdfIn PDF document text
    • https://kazajibabagak.weebly.com/uploads/1/3/4/4/134467412/wojakotud.pdfIn PDF document text
    • https://jiwadurator.weebly.com/uploads/1/3/0/7/130776405/nudalinifogamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://tijoneser.files.wordpress.com/2020/11/31305581676.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/aula_4_espanol.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/tecnologia_da_informao_e_comunicao_livro.pdfIn PDF document text
    • https://derapajovir.files.wordpress.com/2020/11/vobutasug.pdfIn PDF document text
    • https://s3.amazonaws.com/kasuwevovog/tivedikutudumu.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/99523579247.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac8ab11a-3faa-4329-9afc-ad25561f2771/77128232975.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/5048553173.pdfIn PDF document text
    • https://s3.amazonaws.com/kugufitel/81038814190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38d3e707-645e-40f3-ace5-37f8fd295cf0/walt_disney_s_leadership_style.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_off00004fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB6 5224 bytes
SHA-256: 3c8a07c36dfee412c82fb58a98ed48d4ffa3f6f0b972e28cced939dd35cb6e6f
font_01_sfnt_off000061a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A6 10424 bytes
SHA-256: 7e34095b7a40b3d76cd7e1d01a16e61d62514e4ee7d70e5be5520fb8ca33af5c