Malicious PDF — malware analysis report

Static analysis result for SHA-256 d08532fd279ac2bd…

MALICIOUS

PDF

48.1 KB Created: 2020-09-30 08:44:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b3f382f4327441ee92f759e67880b862 SHA-1: e40a6c69fbdbdbf9c55ec888767d3ab5815c8889 SHA-256: d08532fd279ac2bd6031284242b8f1c237d820e5360a2157d45f4857f2db1741
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/strik?keyword=bastien+vives+une+soeur+pdf In PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/50469686520.pdfIn PDF document text
    • https://site-1036838.mozfiles.com/files/1036838/45733406551.pdfIn PDF document text
    • https://site-1037037.mozfiles.com/files/1037037/najevaxavuwobe.pdfIn PDF document text
    • https://site-1037180.mozfiles.com/files/1037180/74695446737.pdfIn PDF document text
    • http://tonux.estateart.net/uploads/1/3/2/6/132695550/9272131.pdfIn PDF document text
    • http://files.mittminders.com/uploads/1/3/1/6/131606467/3663445.pdfIn PDF document text
    • http://muradab.rachelcrawford.org/uploads/1/3/1/0/131070147/8841610.pdfIn PDF document text
    • http://jibapaw.boscawencongregationalchurch.com/uploads/1/3/1/1/131164110/rixibovisu_rikitawikebiles_numemi_bixefa.pdfIn PDF document text
    • http://files.shoppesatbankscrossing.com/uploads/1/3/2/6/132695470/af496b686a9fdf6.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/a2cfd438-b21b-4501-bf77-8e3857cfc77f/85653343800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6538220-cc90-4464-8f47-89af6fb09de0/vogowufum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7156b739-e503-40f8-9479-ea737cee6886/73246463237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1228/4831/files/bunker_hill_security_system_63129.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/robotic_hand_project.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2953/6668/files/alistar_guide_mobafire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2398/5828/files/various_branches_of_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0899/4723/files/namadu.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_off000078e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78E8 5112 bytes
SHA-256: 3b045226a423b0ce4c1ff1de8dfd1c3e74ef274f37596fab29b53fd3c80a3b80
font_01_sfnt_off00008a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A68 12656 bytes
SHA-256: d5740d0627305cf03fa38b81c39b73d704c24ecda2057261ff98a392ae4954f1

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