Malicious PDF — malware analysis report

Static analysis result for SHA-256 10f40c132b14a837…

MALICIOUS

PDF

44.2 KB Created: 2020-10-26 13:18:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 5c9b0e558e72e7ee12030b5ab7a8f173 SHA-1: f3cb156f5440df20026b9b3b30971650cfaf0b33 SHA-256: 10f40c132b14a837d7bd91038b333095a254d8f53c6c7631482f89c340569746
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://ggtraff.ru/aws?keyword=capacitor+time+constant+pdf In PDF document text
    • https://bewapuvin.weebly.com/uploads/1/3/1/4/131453684/goxoj.pdfIn PDF document text
    • https://wepugimi.weebly.com/uploads/1/3/1/0/131070973/varubixesew.pdfIn PDF document text
    • https://pabenegoje.weebly.com/uploads/1/3/4/3/134348732/pupavura-befalal.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/9584872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5f90aebdceaeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379846/normal_5f9116bf86bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_5f8e8b514deda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f8c2adb30943.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5f8c66060db57.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off0000695b.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off0000695b.bin)
    • https://s3.amazonaws.com/sugowubuf/xopatawisejom.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/medical_certificate_for_leave.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/zolojamidikuvageb.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/76765147045.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/irrigation_agronomy_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0314/9479/files/15520203321.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6491/7661/files/best_ip_cam_viewer_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff01c4bd-8977-4bc8-9ce7-dffb6c5fd035/trigonometria_ejercicios_dificiles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b040d391-157a-4f6d-afb9-28b988934669/livros_sobre_maonaria_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/213ee1bc-e05e-492b-8917-11734398f179/banesinomoleluranutor.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_off0000695b.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000695b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x695B 5172 bytes
SHA-256: c169dfeab7d40478007b5c367ef49afae0c66e1c4ebd9967924e45d44f004011
font_01_sfnt_off00007ad1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD1 12380 bytes
SHA-256: 12a2f2abf906b033a9d1260f87cd2214fbd74ec185ff0e710e82f4ed842f3a67