Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe273e321ab43dc…

MALICIOUS

PDF

38.3 KB Created: 2020-10-25 13:37:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 08884fad32123bd0f19234026d232f7f SHA-1: 0143a020a55dc2d65f04fe1c00d0642f6ac074d0 SHA-256: 5fe273e321ab43dc76d62d94666a4e4983def0e98c99b91e124d20e60c04141d
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://cctraff.ru/aws?keyword=here+i+am+to+worship+chords+key+of+g+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368250/normal_5f89f8a9643a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f893a2dbe1b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5f8e80ac30d21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5f8e2b69bc440.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365545/normal_5f871766f159a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5f8871721db9a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380405/normal_5f8ff4126c57d.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/veperinubojami.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/dixaviwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000055df.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000055df.bin)
    • https://uploads.strikinglycdn.com/files/ce716cdf-f5a9-4fc2-b5f0-c586ad8a8b9e/xusogiraluvomadipozejuse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162f93e9-b98c-4e11-b7f2-db12d19f0c64/37057003419.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b0dcc2-6660-4f2e-962f-9ce704786be2/85951215751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4563f05d-8767-460e-8adc-4e9823ed71d1/tapukurekudaxokutur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835390d7-5632-4edd-be17-3591ea1dc4f0/nada_atv_blue_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/8786/2194/files/cisf_head_constable_post_syllabus_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1966/3522/files/47375686305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0091/2278/files/17828091814.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/0651/3311/files/daily_schedule_template_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/6797/9958/files/iskysoft_editor_crack_professional.rar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/7853/7382/files/aristotle_poetics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0126/9405/files/monopoly_apk_full_mega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6047/3241/files/74862173000.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_off000055df.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000055df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55DF 5756 bytes
SHA-256: 53046886ba36e309f2b49dcd8dea370b6e95ea6d184a759cde8bdb470ef566fe
font_01_sfnt_off0000696d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x696D 9924 bytes
SHA-256: 50dec19bc74da7efaa4cd075c0c94d8d6d46a29a75a8810de0ffa8996f43273f