Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e90a43c9b969f5f…

MALICIOUS

PDF

42.0 KB Created: 2020-11-08 11:57:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: c00c3c002b7e0342c6fde6a939217fe0 SHA-1: 68c80c3d006d069715e2c5554553010821379460 SHA-256: 9e90a43c9b969f5f6c0b0d7624d1a3df72cf7840bcf32856540b22c5e1213f63
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://traffking.ru/aws?keyword=windows+10+pro+loader+download+free In PDF document text
    • https://fusajebotiv.weebly.com/uploads/1/3/4/3/134320253/sixefogale_vegudagibum_kufew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415950/normal_5fa04e4fd4c1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f976c5e49cc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420018/normal_5fa3ee119c80f.pdfIn PDF document text
    • https://gupupekulumo.weebly.com/uploads/1/3/4/1/134108922/pekudakamurakosemi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374520/normal_5f9bcb9da9f6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388613/normal_5f959997010f4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374021/normal_5f9ccedee1cfc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392462/normal_5fa1c2dd772dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gogajajar.files.wordpress.com/2020/11/48539197016.pdfIn PDF document text
    • https://forakufu.files.wordpress.com/2020/11/idola_phantasy_star_saga_reroll_guide.pdfIn PDF document text
    • https://xomujunu.files.wordpress.com/2020/11/56143571898.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14a37288-87d1-4970-8812-acbc39dbd894/84432060300.pdfIn PDF document text
    • https://lapemebotu.files.wordpress.com/2020/11/71585697742.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_off0000661d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x661D 5336 bytes
SHA-256: 6b24cd0cab08bbb6f50c426cd0ec68fccb1b2f46af337c41676ace2d09180ba1
font_01_sfnt_off0000786e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786E 10156 bytes
SHA-256: 8677bd1bf7f80994e4ed635edb3deaf46ddaf354fb1cf97208641a830bb770a8