Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4a11424e145179…

MALICIOUS

PDF

45.5 KB Created: 2020-10-25 07:32:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 38e9407f211753c0e73df6ecc229963c SHA-1: 61e37099a9bac1653e0e71f21324b37dce9edec4 SHA-256: 3c4a11424e145179ce638c1f47d261571645f7eb4a0752efd9e6b4e114c18e78
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/strik?keyword=meditation+pleine+conscience+pdf In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/3257372.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ratot_muweliwamopoj.pdfIn PDF document text
    • https://ditiwudo.weebly.com/uploads/1/3/1/4/131452947/fulutivodozoruxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369495/normal_5f8c388abe80d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_5f91ea5bd8764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5f8ab13c132c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_5f931f4661b07.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off000071a5.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off000071a5.bin)
    • https://cdn.shopify.com/s/files/1/0494/0365/8407/files/43052841832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9095/1848/files/oxford_textbook_of_emergency_medicine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6675/2675/files/96293448050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7673/9782/files/telawezagomavibiti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/2277/4180/files/rojizawuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbded385-fc7c-4461-b3ef-180606c3c19c/pikogulifetesufatutakelul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb5cb785-e66c-41f8-a9cc-db1c4e0994ea/12503651811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3454da-fcbf-4b0b-8b4b-e72b3e6aebbc/wevorokuvadakenelof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c50fc65-2f8c-4fc3-a63b-317ade08ca42/9852634159.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92e0283-dc88-44aa-aa14-3db51a353ab5/valor_presente_ejercicios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9699/2663/files/46509819592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5977/1061/files/facebook_messenger_video_calling_free_download_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b28e2b-140a-4c1e-abeb-0a586bdd1b2a/rezomikekosevitirojanasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c54b3b6-522a-4664-abae-e51ddc8536c2/29496929978.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fbfbb4d-e451-4231-8945-ac482143fd89/95922905468.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d1f8c74-d25e-4f98-a76a-cda9dc26bbee/nofebizunixege.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/997c83b6-4a2d-4e91-b295-9a5dc854a262/japamedikapovalorikeril.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_off000071a5.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A5 5056 bytes
SHA-256: dcf6c2db80cfc50880558b6a119c9b8311abe48c33636096168b3423c4517844
font_01_sfnt_off000082f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F9 10848 bytes
SHA-256: fff482cee68b58427d08a5639d890ddd639a08990eb2d164d13160e5bc3a7a7f