Malicious PDF — malware analysis report

Static analysis result for SHA-256 222126ac282b99c5…

MALICIOUS

PDF

44.5 KB Created: 2020-11-05 20:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 3ae6473215a248964ad08bf94d573585 SHA-1: 595f5e2798cb2e63cb1cf289f1a7f2321d43b9b0 SHA-256: 222126ac282b99c5dbf560ad80b627760b00f06d1e8e3d77194b0ee7ea6016bc
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=tammy+duckworth+wikipedia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4401545/normal_5f9c489f2639c.pdfIn PDF document text
    • https://waxifititisapo.weebly.com/uploads/1/3/4/3/134363739/7243033.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/gujukowafe_gurefasizelowe.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/7089992.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f87b4f3f4186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369519/normal_5f8a89aacf974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_5f9f1afc29185.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452398/normal_5f9f036619825.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/baf9591.pdfIn PDF document text
    • https://gejosabuvin.weebly.com/uploads/1/3/4/4/134457948/regenuwakaka-xekubune.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gowebabuxogiro/padmavati_full_movie_download_hd_4k.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_off00006f99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 5312 bytes
SHA-256: 758bef6c7aef27cf3717b29b22a7ca7de179009311f1fd50f37ace2b93ee92af
font_01_sfnt_off00008199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8199 10576 bytes
SHA-256: 8a8072bd3ea4bca75449de679cc1624f4acb0cca3d6d97680ee9383b343bdf0a