Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca4e228e8a4d941…

MALICIOUS

PDF

41.4 KB Created: 2020-10-14 19:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 70a4bed372237ba45902577a8b1faf4d SHA-1: 7055eed12229c425d1f3f5c6a4bbaa565a7a6b64 SHA-256: 8ca4e228e8a4d941f5248fb682d97b681dbc83b1cfe862c4adb0bd89ed81fc0e
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ttraff.link/pify?keyword=box+and+whisker+plot+worksheets+kuta+software In PDF document text
    • https://site-1042013.mozfiles.com/files/1042013/nemimaman.pdfIn PDF document text
    • https://site-1038317.mozfiles.com/files/1038317/30804679824.pdfIn PDF document text
    • https://site-1039147.mozfiles.com/files/1039147/wuxuwujo.pdfIn PDF document text
    • https://site-1040892.mozfiles.com/files/1040892/48405400055.pdfIn PDF document text
    • https://site-1037182.mozfiles.com/files/1037182/85077344856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f87046721816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f870d91c65d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f87210ee0246.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365635/normal_5f86f72deea45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f87187cbc2c0.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/ce895.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/kizerapu.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lulodegoner.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/29702005-2828-42a1-b49c-bac188443256/zijijonejotesedibi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc0340d3-b672-46f0-bc51-6a4bfb750297/woriduxaziz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34f1927d-a995-4f03-825c-0b842a889e97/wogakodi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05a7cb98-0a1d-48f4-ba66-ba6ed9a9f8e0/rapulejokidawav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c0e2b77-04c1-4bdc-b7a6-594a869732a7/wokinod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faef444f-1aaa-4700-8104-4b23b1ed04c2/88818128479.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bb725c7-44ae-4a89-b213-76865048e07c/81864380909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78741b30-ea3a-4eca-b73a-0170a14c4198/13873372399.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/554ac19f-e0d1-486d-9f79-1c4c168a93ac/dezujumuwopotilitodig.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_off000063e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63E1 5400 bytes
SHA-256: 08814774ec530c99332f619e96d6dd1e36ce63668f5d2fa6fa0d8f6a15751796
font_01_sfnt_off0000764d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x764D 9756 bytes
SHA-256: dc0e718efab7e2bc4ad7078ae05351ead1f82166e87f8e953875ac3c4f371b16