Malicious PDF — malware analysis report

Static analysis result for SHA-256 134d4573b765effb…

MALICIOUS

PDF

46.8 KB Created: 2020-10-14 23:03:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 79eeeac599dc45a8f25a826ab01f5cbb SHA-1: 2da1c0260c47da22a46defa908efd61a2cfb2b69 SHA-256: 134d4573b765effbdf04ca5e3767e8a73862c96056452646ad997c46caa6d27c
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://ggtraff.ru/123?keyword=past+simple+passive+rules+pdf In PDF document text
    • https://site-1040002.mozfiles.com/files/1040002/1176412395.pdfIn PDF document text
    • https://site-1043220.mozfiles.com/files/1043220/13341500228.pdfIn PDF document text
    • https://site-1040398.mozfiles.com/files/1040398/69328337100.pdfIn PDF document text
    • https://site-1040003.mozfiles.com/files/1040003/57161364601.pdfIn PDF document text
    • https://site-1041942.mozfiles.com/files/1041942/27452784489.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/mikematuvobejo-jixekajes-zunugogixo.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/5041229.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/b626fe5a22736.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/wuzejorepadako-xawexujo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7e993446-e986-4d26-995f-55203621dace/belewefiketazexemonawe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab4a265-e322-48fe-bd18-a03ae00c7f24/65983077775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4abbf6b6-09f2-4a54-8098-86656374030a/mufomovudilezeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d491bf6c-1e71-4245-a163-63a5e5f75ada/palebosizenugader.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aef90efe-1b02-4a02-ac47-79a17a35955b/tiribitutuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0e00cf7-a657-4a95-a389-86bbb8093801/tatufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58e54f08-b210-403a-b34e-5ce40b2c7770/nixomoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f75ed151-9136-4c82-a924-4b343ea43b3a/nepadi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b559403-2df2-4e76-ba90-0f247561ae62/89577843109.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C7E 4916 bytes
SHA-256: 094907d962f0a57064bc04395bfdd52438af634991513fd6a8c2aa8aa8d42d80
font_01_sfnt_off00007d35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D35 10100 bytes
SHA-256: 6d74ffc5cd84806f02a2037e5efce58306223f39e4f8663358a4818e191877df
font_02_sfnt_off00009fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FAB 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361