Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb4f4a7c9df3e7d9…

MALICIOUS

PDF

43.5 KB Created: 2020-10-11 09:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: e670099e5b737a14e078ea47b9c43867 SHA-1: 61615278bbf0b2f3f17b38cacb3956dfa8886c6b SHA-256: cb4f4a7c9df3e7d9884ac7c14f51ea0348eb41843321f62caae68ae2df654370
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.club/pify?keyword=ode+to+joy+lyrics+hymn In PDF document text
    • https://site-1041927.mozfiles.com/files/1041927/65434186456.pdfIn PDF document text
    • https://site-1039576.mozfiles.com/files/1039576/vezufa.pdfIn PDF document text
    • https://site-1036879.mozfiles.com/files/1036879/sunewex.pdfIn PDF document text
    • https://site-1042188.mozfiles.com/files/1042188/diwilo.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/soloxarajokejomodoboke.pdfIn PDF document text
    • https://site-1039409.mozfiles.com/files/1039409/33705295619.pdfIn PDF document text
    • http://pujarim.timothyalexandrewallace.com/uploads/1/3/0/7/130776225/542bd114c40d.pdfIn PDF document text
    • http://xipovoti.lqblackpool.co.uk/uploads/1/3/1/3/131380349/xemovaxixami_puvitukefe_ramifopoji_fomobamaki.pdfIn PDF document text
    • http://xolovami.trudycoylecrafts.com/uploads/1/3/1/3/131380601/ae63b.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/34e68eed-863c-4724-9cd6-c3741b967f12/fuzujizan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62b1383a-3cb5-456f-8ca3-646abb1592ef/zezimonewigukadakululebox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dde408cd-3c41-4fd1-acc6-32e26e2bd3e0/78319656639.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2deef1cd-9c14-40d0-ba8b-af1e27652117/kosuz.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_off00006971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6971 5172 bytes
SHA-256: 1cbdda53f4bf45cfee63f215ed5d76167644f807c4486e3a02549efd4777251b
font_01_sfnt_off00007aec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEC 10664 bytes
SHA-256: 0610a0a550447e8607510b40c51771175dd97b283e9ffe6a1f0496779cc81d0a